user manual

ManualsBrandsEmerson ManualsSatellite RadioSatellite Radio 848L

www.rosemount.com

Reference Manual

00809-0100-4696, Rev AA

September 2004

Rosemount 848L Logic Transmitter

with F

OUNDATION

™

Fieldbus

Product Discontinued

Summary of content (105 pages)

PAGE 1
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L Logic Transmitter with FOUNDATION™ Fieldbus P r oduc tDi s c ont i nue d www.rosemount.
PAGE 2
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L Rosemount 848L Discrete Logic Temperature Transmitter with FOUNDATION Fieldbus NOTICE Read this manual before working with the product. For personal and system safety, and for optimum product performance, make sure to thoroughly understand the contents before installing, using, or maintaining this product. The United States has two toll-free assistance numbers and one international number. Customer Central 1-800-999-9307 (7:00 a.m.
PAGE 3
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L Table of Contents SECTION 1 Introduction Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Transmitter . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 4
Reference Manual Rosemount 848L 00809-0100-4696, Rev AA September 2004 SECTION 4 Operation and Maintenance Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 Foundation Fieldbus Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 Commissioning (Addressing) . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 5
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L APPENDIX D Logic Equation Syntax Error Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-4 Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-5 APPENDIX E Motor Control Introduction to Motor Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E-1 Variations on Motor Control . . . . . . . . . .
PAGE 6
Reference Manual Rosemount 848L TOC-4 00809-0100-4696, Rev AA September 2004
PAGE 7
Reference Manual 00809-0100-4696, Rev AA September 2004 Section 1 Rosemount 848L Introduction Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-2 Return of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 8
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L OVERVIEW Transmitter The 848L provides a cost effective field mounted interface for discrete inputs and outputs on a Foundation Fieldbus H1 network. The 848L allows you to leverage the fieldbus network to reduce discrete input and output wiring and eliminate the need for a separate bus for discrete inputs and outputs.
PAGE 9
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L Appendix A: Specification and Reference Data • Specifications • Dimensional Drawings • Ordering Information Appendix B: Product Certificates • Hazardous Locations Certificates • Intrinsically Safe and Non-Incendive Installations • Installation Drawings Appendix C: Function Blocks • Device Descriptions • Block Operation Appendix D: Logic Equation Syntax • Error Handling • Examples Appendix E: Motor Control • Variations of Motor
PAGE 10
Reference Manual Rosemount 848L 1-4 00809-0100-4696, Rev AA September 2004
PAGE 11
Reference Manual 00809-0100-4696, Rev AA September 2004 Section 2 Rosemount 848L Installation Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-1 Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-1 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-4 Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-5 Switches . . . . . . . . . . . .
PAGE 12
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L Mounting to a DIN Rail Without an Enclosure To mount the 848L to a DIN rail without an enclosure, follow these steps: 1. Pull up the DIN rail mounting clip located on the top back side of the transmitter. 2. Hinge the DIN rail into the slots on the bottom of the transmitter. 3. Tilt the 848L and place onto the DIN rail. Release the mounting clip. The transmitter should be securely fastened to the DIN rail. Figure 2-1.
PAGE 13
Reference Manual 00809-0100-4696, Rev AA September 2004 Use the optional mounting bracket (option code B6) to mount the 848L to a 2-inch pipe stand when using a junction box. Front View 5.1 (130) 10.2 (260) Side View 6.6 (167) fully assembled Stainless Steel Junction Box (style JS) Front View 4.5 (114) Side View 848_848A52A, B, 53A, B Aluminum/Plastic Junction Box (styles JA and JP) 7.
PAGE 14
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L WIRING If the device or sensors are installed in a high-voltage environment and a fault condition or installation error occurs, the sensor leads and transmitter terminals could carry lethal voltages. Use extreme caution when making contact with the leads and terminals. NOTE Do not apply high voltage (e.g. AC line voltage) to the transmitter bus or I/O power terminals.
PAGE 15
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L 848/848L/848L_19_AA.EPS Figure 2-4. “Bus” location on the Rosemount 848L Input/Output Power: The discrete I/O requires a 9-32VDC power supply that is separate from the fieldbus power. The voltage level will depend on the type of sensors being used and outputs being driven. To power the I/O: 1. Connect the positive lead from the power supply to the (+) terminal marked "PWR". 2.
PAGE 16
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L Security After configuring the transmitter, the data can be protected from unwarranted changes. Each 848L is equipped with a security switch that can be positioned “ON” to prevent the accidental or deliberate change of configuration data. This switch is located on the front side of the electronics module and is labeled SECURITY. See Figure 2-5 on page 2-5 for switch location on the transmitter label.
PAGE 17
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L I/O WIRING DISCRETE INPUT WIRING CONFIGURATION 2-Wire NAMUR Sensors 1 of 2 Input Connectors Dry Contact Switches 1 of 2 Input Connectors 3-Wire NAMUR Sensors 1 of 2 Input Connectors 848/848L/848L_10_AA, 848L_11_AA, 848L_12_AA, 848L_13_AA, 848L_14_AA.
PAGE 18
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L TAGGING Commissioning Tag The 848L is supplied with a removable commissioning tag that contains both the Device ID (the unique code that identifies a particular device in the absence of a device tag) and a space to record the device tag (the operational identification for the device as defined by the Piping and Instrumentation Diagram (P&ID)).
PAGE 19
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L TRANSMITTER LABEL 848/848_21_AA.EPS Figure 2-7. Transmitter Label INSTALLATION Figure 2-8. Installing the 848L with Cable Glands Use the following steps to install the 848L with Cable Glands: 1. Remove the junction box cover by unscrewing the four cover screws. 2. Run the sensor and power/signal wires through the appropriate cable glands using the pre-installed cable glands (see Figure 2-8). 3.
PAGE 20
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L Using Conduit Entries Use the following steps to install the 848L with Conduit Entries: 1. Remove the junction box cover by unscrewing the four cover screws. 2. Remove the five conduit plugs and install five conduit fittings (supplied by the installer). 3. Run sensor and output wires through each conduit fitting. 4. Install the I/O wires into the correct screw terminals. 5.
PAGE 21
Reference Manual 00809-0100-4696, Rev AA September 2004 Section 3 Rosemount 848L Configuration Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-1 Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-1 General Block Information . . . . . . . . . . . . . . . . . . . . . . . . . page 3-2 Resource Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-4 I/O Transducer Block . . . . . . . . . . . . . . .
PAGE 22
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L GENERAL BLOCK INFORMATION Modes The Resource, Transducer, and all function blocks in the device have modes of operation. These modes govern the operation of the block. Every block supports both automatic (AUTO) and out of service (OOS) modes. Other modes may also be supported. Changing Modes To change the operating mode, set the MODE_BLK.TARGET to the desired mode. After a short delay, the parameter MODE_BLOCK.
PAGE 23
Reference Manual 00809-0100-4696, Rev AA September 2004 Link Active Scheduler Rosemount 848L The Rosemount 848L can be designated to act as the backup Link Active Scheduler (LAS) in the event that the LAS is disconnected from the segment. As the backup LAS, the Rosemount 848L will take over the management of communications until the host is restored. The host system may provide a configuration tool specifically designed to designate a particular device as a backup LAS.
PAGE 24
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L Capabilities Virtual Communication Relationship (VCRs) There are a total of 20 VCRs. Two are permanent and 18 are fully configurable by the host system. 25 link objects are available.
PAGE 25
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L SOFT WRITE LOCK and HARD WRITE LOCK Inputs to the security and write lock functions include the hardware security switch, the hardware and software write lock bits of the FEATURE_SEL parameter, the WRITE_LOCK parameter, and the DEFINE_WRITE_LOCK parameter. The WRITE_LOCK parameter prevents modification of parameters within the device except to clear the WRITE_LOCK parameter.
PAGE 26
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L PlantWeb™ Alarms The Resource Block will act as a coordinator for PlantWeb alarms. There will be three alarm parameters (FAILED_ALARM, MAINT_ALARM, and ADVISE_ALARM) which will contain information regarding some of the device errors which are detected by the transmitter software. There will be a RECOMMENDED_ACTION parameter which will be used to display the recommended action text for the highest priority alarm.
PAGE 27
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L MAINT_ALARMS A maintenance alarm indicates the device or some part of the device needs maintenance soon. If the condition is ignored, the device will eventually fail. There are five parameters associated with MAINT_ALARMS, they are described below. MAINT_ENABLED The MAINT_ENABLED parameter contains a list of conditions indicating the device or some part of the device needs maintenance soon.
PAGE 28
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L ADVISE_ACTIVE The ADVISE_ACTIVE parameter displays which of the advisories is active. Only the advisory with the highest priority will be displayed. This priority is not the same as the ADVISE_PRI parameter described above. This priority is not user configurable. ADVISE_ALM ADVISE_ALM is an alarm indicating advisory alarms. These conditions do not have a direct impact on the process or device integrity.
PAGE 29
Reference Manual 00809-0100-4696, Rev AA September 2004 Alarms I/O TRANSDUCER BLOCK Rosemount 848L Use the following steps to configure the alarms, which are located in the Resource Block. 1. Set the resource block to OOS. 2. Set WRITE_PRI to the appropriate alarm level (WRITE_PRI has a selectable range of priorities from 0 to 15. Set the other block alarm parameters at this time. 3.
PAGE 30
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L The 848L can force the outputs to a predetermined state in the event of a device malfunction. The following procedure can be used to set the fail safe condition for each output: 1. Set MODE_BLK.TARGET to OOS 2. For each Output "n" select the parameter OUT_n_CONFIG.FAIL_SAFE 3. Select False, True or Last Good Value 4. Set MODE_BLK.
PAGE 31
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L Figure 3-1.
PAGE 32
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L The following characters are allowed in a logic equation: • Uppercase and lowercase alphabet, case insensitive, used to specify functions • Digits 0-9, used to specify channel numbers and unsigned integer constants • Comma, used to separate parameters in a function parameter list • Parentheses() used to define the extent of the parameter list of a function • Semicolon; used to terminate an equation • Space (not tab), ignored
PAGE 33
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L PS - When the hardware input consists of a continuous train of pulses at a rate less than 500 PPS, a prescaler can be used to reduce the pulse rate to something that does not change faster than the equation evaluation rate. The function is PS (i, divisor) where ‘i’ is the channel number (1-8) and ‘divisor’ is the number of pulses to count before setting its output true for one equation evaluation cycle.
PAGE 34
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L EQ - Channels 17-32 are set by the result of an equation specified by up to 80 characters and stored in parameter EQx, where x is the equation number. The equation results are available as a discrete value and status in parameter EQx_VALUE. They may be referenced by the EQ (u) function. The range of ‘u’ is 1 to 16.
PAGE 35
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L Logic Functions A function has a name and a set of one or more arguments contained within a closed set of parentheses. The seven channel reference functions (IN, ICF, ICR, PS, DO, EQ, and OUT) have been described above. These are the only functions that take a channel number as an argument. The other functions require functions for all arguments unless the last argument is a constant number.
PAGE 36
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L Logic Operator Functions The following combinatorial operators require a minimum of 2 and a maximum of 10 functions between the parentheses, each separated by a comma. AND ( ) - Performs the logical ‘and’ of the argument functions. OR ( ) - Performs the logical ‘or’ of the argument functions. XOR ( ) - Performs the logical exclusive ‘or’ of the argument functions.
PAGE 37
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L Counter Functions CTU (clock, reset, target)- The parameters clock and reset are functions. The target is a 16 bit constant. Whenever reset is true, the internal counter is set to zero and the value of the function is false. The value of clock is ignored while reset is true. If reset is false, the internal counter will increment once for each rise of the clock parameter.
PAGE 38
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L TP (power, target) - Whenever power transitions from false to true, the value of the internal timer is set to the target and the value of the function is true. The value of the function will become false after the target amount of time has elapsed. This function is similar to TOF except that a timing cycle is only initiated by the rise of power. Power may go false or stay true without affecting the timing cycle.
PAGE 39
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L SHR (input, shift, reset, testbit) - The parameters input, shift and reset are functions. The parameter testbit is a constant that is constrained to be in the range of 1 to 8. The reset function is optional. If reset is present and true, the 8 bit register is cleared to zero and the result of the function is false.
PAGE 40
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L Logic Execution Timing The Logic transducer block reads the hardware inputs, processes the equations and drives the outputs on a continuous cycle. The cycle time or frequency of execution will vary depending on the number and type of logic functions used in the equations. DISCRETE INPUT BLOCKS The DI blocks are used to communicate the current value of a contact, the state of one of the Boolean equations, or the state of an output.
PAGE 41
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L Simulation Simulation replaces the channel value coming from the transducer block for testing purposes. The following procedure is used to simulate a DI output. To change the output value place the Target Mode of the block to Manual and then change the OUT_D.VALUE to the desired value. To simulate both the value and status do the following: 1. If the Simulate Switch is in the OFF position, move it to ON.
PAGE 42
Reference Manual Rosemount 848L 3-22 00809-0100-4696, Rev AA September 2004
PAGE 43
Reference Manual 00809-0100-4696, Rev AA September 2004 Section 4 Rosemount 848L Operation and Maintenance Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 4-1 Foundation Fieldbus Information . . . . . . . . . . . . . . . . . . . page 4-1 Hardware Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 4-2 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 44
Reference Manual 000809-0100-4696, Rev AA September 2004 Rosemount 848L Commissioning (Addressing) To be able to setup, configure, and have a device communicate with other devices on a segment, a device must be assigned a permanent address. Unless requested otherwise, it is assigned a temporary address when shipped from the factory. If there are two or more devices on a segment with the same address, the first device to start up will use the assigned address (ex. Address 20).
PAGE 45
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L TROUBLESHOOTING FOUNDATION Fieldbus Symptom Possible Cause Corrective Action Device does not show up in the live list Network configuration parameters are incorrect Set the network parameters of the LAS (host system) according to the FF Communications Profile ST: 8 MRD: 10 DLPDU PhLO: 4 MID: 7 TSC: 4 (1 ms) T1: 1920000 (60 s) T2: 5760000 (180 s) T3: 480000 (15 s) Set first Unpolled Node and Number of UnPolled Nodes so that the dev
PAGE 46
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L 4-4
PAGE 47
Reference Manual 00809-0100-4696, Rev AA September 2004 Appendix A Rosemount 848L Reference Data Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page A-1 Dimensional Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . page A-5 Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 48
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L Outputs 4 Discrete Outputs 9-32 VDC loads Maximum load inductance 300 mH Current Ratings: 1.0 A maximum for single channel on, 4.0 A maximum per device. Output devices must be selected as follows: 1. Designed to use the same DC voltage as supplied to the 848L I/O power terminals. 2. The DC resistance must be large enough that they consume no more than 1 amp of current steady state.
PAGE 49
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L Isolation Input-Output 1200 VDC; 600 V rms 50/60 Hz for dry and 2-wire NAMUR contact inputs No isolation when using 3-wire sensors Input- Foundation Fieldbus 1200 VDC; 600 V rms 50/60 Hz Output- Foundation Fieldbus 1200 VDC; 600 V rms 50/60 Hz Input power- Foundation Fieldbus 1200 VDC; 600 V rms 50/60 Hz Input / Output Power Requirements 24 VDC nominal, 9 VDC minimum, 32 VDC maximum Supply Current Rating 0.
PAGE 50
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L Physical Specifications Environmental Ratings Electronics (no enclosure) -40°C to +85°C 99% non-condensing humidity IP20 Unit (electronics and enclosure) -40°C to +85°C 100% condensing humidity IP66 Function Blocks Specification H1 Segment Device Back-up LAS Resource Block I/O Transducer Block All inputs can optionally be latched for the duration necessary for each input to be read during a macrocycle Logic Transducer Block (20 Boole
PAGE 51
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L MOTOR_STARTER_LOGIC.TIF EXAMPLE FOR THE LOGIC EXECUTION: This diagram shows motor starter logic with start and stop buttons and an auxiliary contact which maintains current after the start button is pressed. Which would translate to a Boolean equation of: AND(IN(1),OR(IN(2),IN(3))) DIMENSIONAL DRAWINGS Figure A-2. Rosemount 848L Dimensional Drawings Top View 3-D View 848/848L/848L_06_AA, 848L_07_AA, 848L_08_AA, 848L_09_AA.EPS 6.
PAGE 52
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L Figure A-3. Rosemount 848L Wiring Diagram DISCRETE INPUT WIRING CONFIGURATION 2-Wire NAMUR Sensors 1 of 2 Input Connectors 3-Wire NAMUR Sensors 1 of 2 Input Connectors 9-32 VDC Sensors 1 of 2 Input Connectors DISCRETE OUTPUT WIRING CONFIGURATION 9-32 VDC Outputs A-6 848/848L/848L_10_AA, 848L_11_AA, 848L_12_AA, 848L_13_AA, 848L_14_AA.
PAGE 53
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L ORDERING INFORMATION Model Product Description (Includes One Fieldbus H1 Segment) 848L Fieldbus Logic Transmitter Code Communications Protocol FOUNDATION™ fieldbus digital signal (includes 8 DI, 4 DO, 1 MDI, and 1 MDO function blocks, and Backup Link Active Scheduler) F Code A Power Input Bus and I/O Power (4-wire) Product Certifications Rosemount Junction Box required? NA No Approval No N1 CENELEC ATEX Type n (enclosure r
PAGE 54
Reference Manual Rosemount 848L A-8 00809-0100-4696, Rev AA September 2004
PAGE 55
Reference Manual 00809-0100-4696, Rev AA September 2004 Appendix B Rosemount 848L Product Certifications Approved Manufacturing Locations . . . . . . . . . . . . . . . . . page B-1 European Directive Information . . . . . . . . . . . . . . . . . . . . page B-1 Hazardous Locations Certificates . . . . . . . . . . . . . . . . . . . page B-1 APPROVED MANUFACTURING LOCATIONS Rosemount Inc.
PAGE 56
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L European Approvals CENELEC Approvals N1 CENELEC Type n Certification Number: Baseefa04ATEX0027X ATEX Marking II 3 G EEx nA nL IIC T4 (Tamb = –40°C to 50°C) Power/Bus Max Supply Voltage = 32.0 V Special Conditions for Safe Use (x): 1. The ambient temperature range of use shall be the most restrictive of the apparatus, cable gland or blanking plug. 2.
PAGE 57
Reference Manual 00809-0100-4696, Rev AA September 2004 Appendix C Rosemount 848L Function Blocks Resource Block Parameters . . . . . . . . . . . . . . . . . . . . . . . page C-1 I/O Transducer Parameters . . . . . . . . . . . . . . . . . . . . . . . . page C-5 Logic Transducer Parameters . . . . . . . . . . . . . . . . . . . . . . page C-8 Discrete Input Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page C-9 Discrete Output Block . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 58
Reference Manual Rosemount 848L 00809-0100-4696, Rev AA September 2004 Table C-1.
PAGE 59
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L Table C-1. Resource Block Parameters Number 53 54 55 56 57 58 59 60 61 62 63 Parameter Description OUTPUT_ BOARD_ SN FINAL_ ASSY_ NUM DETAILED_ STATUS SUMMARY_ STATUS MESSAGE_ DATE MESSAGE_ TEXT SELF_ TEST DEFINE_ WRITE_ LOCK Output board serial number.
PAGE 60
Reference Manual Rosemount 848L 00809-0100-4696, Rev AA September 2004 Table C-1. Resource Block Parameters Number C-4 Parameter Description 80 ADVISE_ ENABLE 81 ADVISE_ MASK 82 83 ADVISE_ ACTIVE HEALTH_ INDEX 84 PWA_ SIMULATE 85 ADVISE_ ACTIVE Enabled ADVISE_ ALM alarm conditions. Corresponds bit for bit to ADVISE_ ACTIVE. A bit on means that the corresponding alarm condition is enabled and will be detected.
PAGE 61
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L I/O TRANSDUCER PARAMETERS Table C-2. I/O Transducer Parameters Numbe Parameter r 1 2 3 4 5 ST_ REV TAG_ DESC STRATEGY ALERT_ KEY MODE_ BLK 6 BLOCK_ ERR 7 8 UPDATE_ EVT BLOCK_ ALM 9 TRANSDUCER_ DIRECTORY 10 11 12 TRANSDUCER_ TYPE XD_ ERROR COLLECTION_ DIRECTORY IN_ 1_ TAG IN1 PULSE_ COUNT_ 1 IN_ 1_ CONFIG.IO_TYPE IN_ 1_ CONFIG.FILTER IN_ 1_ CONFIG.FAIL_ SAFE IN_ 2_ TAG IN2 PULSE_ COUNT_ 2 IN_ 2_ CONFIG.IO_TYPE IN_ 2_ CONFIG.
PAGE 62
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L Table C-2. I/O Transducer Parameters Numbe Parameter r 29 30 31 32 33 34 35 35 35 36 37 38 39 39 39 40 41 42 43 43 43 44 45 46 47 47 47 48 49 50 51 52 53 53 53 54 55 56 56 56 C-6 TRANSDUCER_ TYPE_ 2 XD_ ERROR_ 2 COLLECTION_ DIRECTORY_ 2 IN_ 5_ TAG IN5 PULSE_ COUNT_ 5 IN_ 5_ CONFIG.IO_TYPE IN_ 5_ CONFIG.FILTER IN_ 5_ CONFIG.FAIL_ SAFE IN_ 6_ TAG IN6 PULSE_ COUNT_ 6 IN_ 6_ CONFIG.IO_TYPE IN_ 6_ CONFIG.FILTER IN_ 6_ CONFIG.
PAGE 63
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L Table C-2. I/O Transducer Parameters Numbe Parameter r 57 58 59 Description OUT_ 3_ TAG OUT3 OUT_ 3_ CONFIG.IO_TYPE OUT_3_CONFIG.FILTER OUT_3_CONFIG.FAIL_S AFE OUT_ 4_TAG OUT4 OUT_ 4_ CONFIG.IO_TYPE OUT_ 4_ CONFIG.FILTER OUT_ 4_ CONFIG.FAIL_ SAFE An identifier associated with discrete output 3. The value and status of discrete Output 3. The transducer type of discrete sensor 11.
PAGE 64
Reference Manual Rosemount 848L 00809-0100-4696, Rev AA September 2004 LOGIC TRANSDUCER PARAMETERS Table C-3.
PAGE 65
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L Table C-3. Logic Transducer Parameters and Descriptions 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 Parameter Description EQ10_ VALUE EQ11_ VALUE EQ12_ VALUE EQ13_ VALUE EQ14_ VALUE EQ15_ VALUE EQ16_ VALUE OUT1_ VALUE OUT2_ VALUE OUT3_ VALUE OUT4_ VALUE DO1_ VALUE DO2_ VALUE DO3_ VALUE DO4_ VALUE DO5_ VALUE DO6_ VALUE DO7_ VALUE DO8_ VALUE DETAILED_ STATUS The value and status of the result of computing EQ10.
PAGE 66
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L Table C-4.
PAGE 67
Reference Manual 00809-0100-4696, Rev AA September 2004 DISCRETE OUTPUT BLOCK Rosemount 848L The DO block makes the value sent in SP_D, CAS_IN_D, or RCAS_IN_D available for processing by the device. The CHANNEL selection determines where the value is stored in the 848L. A custom feature of the DO block in the 848L is the ability to accept 8 status bits packed into the single setpoint of a DO block. This is accomplished by selecting the appropriate channel number for packed data.
PAGE 68
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L Table C-5.
PAGE 69
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L Table C-6. Parameters and Description Index Parameter Description 1 2 3 4 5 ST_REV TAG_DESC STRATEGY ALERT_KEY MODE_BLK 6 BLOCK_ERR 7 CHANNEL 8 9 10 11 12 13 14 15 16 17 OUT_D1 OUT_D2 OUT_D3 OUT_D4 OUT_D5 OUT_D6 OUT_D7 OUT_D8 UPDATE_EVT BLOCK_ALM The revision level of the static data associated with the function block. The user description of the intended application of the block.
PAGE 70
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L IN_D1 IN_D3 BLOCK ALGORITHM IN_D4 IN_D5 IN_D6 IN_D7 IN_D8 Table C-7.
PAGE 71
Reference Manual 00809-0100-4696, Rev AA September 2004 Appendix D Rosemount 848L Logic Equation Syntax Error Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page D-4 Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page D-5 www.rosemount.com 1. All lines shall end with a semi-colon. 2.
PAGE 72
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L Table D-1. Supported Functions Function Name D-2 Required number Maximum number of parameters of parameters AND 2 10 CLOCK 2 2 CTU 3 3 DO 1 1 EQ 1 1 FALL 1 1 ICF 1 1 ICR 1 1 IN 1 1 NOT 1 1 OR 2 10 OUT 1 1 Function Description AND (a, b,...); This function's result will be the logical and of a, b,... CLOCK (onTime, offTime); This function is a periodic clock.
PAGE 73
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L Table D-1. Supported Functions Function Name Required number Maximum number of parameters of parameters PS 2 2 RISE 1 1 RS 2 2 SHL 3 4 SHR 3 4 SR 2 2 TOF 2 2 Function Description PS (channel number, divisor); This function is a frequency prescaler. This function's value will be true for 1 execution cycle each time the requested device input has had 'divisor' pulses.
PAGE 74
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L Table D-1. Supported Functions Function Name Required number Maximum number of parameters of parameters TON 2 2 TP 2 2 XOR 2 10 ERROR HANDLING Maximum Instances Function Description TON (a, time); This function is an on delay. When 'a' is false, this function will set its' output to false. When 'a' transitions to true, the function's output will remain false for 'time' * 100 milliseconds before going true.
PAGE 75
Reference Manual 00809-0100-4696, Rev AA September 2004 EXAMPLES Rosemount 848L Take value of input 1 and put it on output 3.... Set OUT3_EQ to: IN(1); For every transition (in both directions) on input 5, send a 200 msec pulse out on output 2, but only if input 2 is low.... Set OUT2_EQ to: AND(OR(TP(IN(5),2),TP(NOT(IN(5)),2)),NOT(IN(2))); Turn on output 1 only after input 8 has gone high 10 times, start over counting when input 6 is set high....
PAGE 76
Reference Manual Rosemount 848L D-6 00809-0100-4696, Rev AA September 2004
PAGE 77
Reference Manual 00809-0100-4696, Rev AA September 2004 Appendix E Rosemount 848L Motor Control Introduction to Motor Control . . . . . . . . . . . . . . . . . . . . . . page E-1 Variations on Motor Control . . . . . . . . . . . . . . . . . . . . . . . page E-2 Writing 848L Equations . . . . . . . . . . . . . . . . . . . . . . . . . . . page E-4 INTRODUCTION TO MOTOR CONTROL Industrial motors require about a kilowatt per horsepower, usually delivered as three phase AC at 440 volts or higher.
PAGE 78
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L The contactor is never controlled with a toggle switch, because that would leave one side of the solenoid electrically hot when the motor overload trips. Standard procedure calls for start and stop push buttons in combination with an auxiliary contact on the contactor. This contact closes when the solenoid is energized and the motor contacts close.
PAGE 79
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L Restart Delay A motor may be used in a condition where starting is difficult, causing the motor to heat rapidly until it gets running. That heat must be allowed to dissipate before the motor is started again. A simple time delay prevents the start button from working until a fixed delay time expires. Another example is the time required for compressor head pressure to bleed off after the compressor motor stops.
PAGE 80
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L Timed Switch The pumps have a known life time within an acceptable risk, so one pump is allowed to run until that time expires. The other pump automatically takes over at that time. Switch on Failure If a process condition can be sensed that says the running pump failed, then the other pump is started regardless of the starting protocol.
PAGE 81
Reference Manual 00809-0100-4696, Rev AA September 2004 Interlock Rosemount 848L An interlock switch is easily added as follows, where input 4 is the normally closed interlock: | | | 1 2 4 Out1 | +--| |--+--||--+--|/|-----------------( )--+ OUT1_EQ | | | | | | 3 | | | +--||--+ | | | • The first expression is still OR(IN(2),IN(3)) • The top and final expression is now AND(IN(1),OR(IN(2),IN(3)),IN(4)); Enter the expression and test as above.
PAGE 82
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L Restart Delay An off delay timer is required as a permissive for starting the motor. When the motor is started, the off delay contact opens the circuit for the start button and keeps it open for a specified time. The motor will be cooled as it runs, so the delay is only applied to the start. Motors that require this are usually large and have long cooling times, like 30 to 100 minutes.
PAGE 83
Reference Manual 00809-0100-4696, Rev AA September 2004 Maximum Restarts Rosemount 848L A large motor is too expensive to replace if it burns up because the operator wanted to give it another try, when in fact the pump was jammed. The life of the contactor is also shortened when it has to interrupt locked rotor current. In this case, it is normally possible for the motor to clear the jam on the second or third try.
PAGE 84
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L Winding Temperature The multi-rung delay mechanism above may be replaced if the motor has a winding temperature sensor and a convertor that opens a contact when the motor is too hot and closes when it is sufficiently cool. The following drawing applies such a contact (as input 4) to the Restart Delay diagram, which reduces it to a permissive circuit.
PAGE 85
Reference Manual 00809-0100-4696, Rev AA September 2004 Hand-Off-Auto Rosemount 848L The HOA switch has one contact that is closed in the Hand position (input 1) and one contact that is closed in the Auto position (input 2). Both contacts are open in the Off position. The local hand controls are Stop (input 3) and Start (input 4). These require the auxiliary contact on the starter (input 5).
PAGE 86
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L Intermediate Stop A reversible motor requires two contactors. One of them swaps two of the motor wires so that it will run in the opposite direction. The contactors must never be closed at the same time, because that would place a short circuit across one of the three phases. Furthermore, motors with lots of attached or internal inertia can be damaged if the shaft does not come to rest before starting up in the other direction.
PAGE 87
Reference Manual 00809-0100-4696, Rev AA September 2004 Redundant Motors Alternate Start Rosemount 848L Two motors drive two pumps in a redundant configuration. The control valve that follows the pumps will just waste the energy of the second pump, possibly damaging the valve, if both pumps on at the same time. There are times when neither pump is required. When a pump is required, the pump that was not in use last time should be started to equalize the wear on the pumps.
PAGE 88
Reference Manual Rosemount 848L Redundant Motors Timed Switch 00809-0100-4696, Rev AA September 2004 Again, redundant pumps are used but only one pump runs at a time. The process runs for years without being shut down. The switch between pumps occurs at a time near the end of the useful life of the pump, usually several thousand hours. Stopping the old pump is delayed by a TOF while the other pump comes up to speed, which the control valve can handle.
PAGE 89
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L Rung L1 is equation 1. It latches on when the start button is true and unlatches when the NC stop button is pushed. The latch remembers start and stop commands to simplify the logic. • The expression is RS(IN(2),NOT(IN(1))); Rung P1 is equation 2, which generates a pulse from one read of channel 5: • The expression is TON(AND(OR(IN(3),IN(4)),NOT(EQ(2))),30000); Rung L2 is equation 3.
PAGE 90
Reference Manual Rosemount 848L Redundant Motors Switch on Failure 00809-0100-4696, Rev AA September 2004 Again, there are redundant pumps. There is a pressure switch in the common discharge line. If the pressure falls then the other pump is started. If the pressure does not recover, possibly because a flammable liquid is pouring on the ground from a broken pump housing, then the alternate pump is stopped. The push button controls are Stop (input 1) and Start (input 2).
PAGE 91
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L Rung L1 is equation 1. It latches on when the start button is true and neither motor is running. It unlatches when the NC stop button is pushed or the pressure stays low for too long. • The expression is RS(AND(NOT(IN(3)), NOT(IN(4)),IN(2)),OR(NOT(IN(1)),EQ(3)); Rung P is equation 2, which generates a 2 second start pulse from the rise of the run latch or the rise of the low pressure condition.
PAGE 92
Reference Manual Rosemount 848L E-16 00809-0100-4696, Rev AA September 2004
PAGE 93
Reference Manual 00809-0100-4696, Rev AA September 2004 Appendix F Rosemount 848L Valve Control Introduction to Valve Control . . . . . . . . . . . . . . . . . . . . . . page F-1 INTRODUCTION TO VALVE CONTROL Industrial valves have two general classifications, regulating and block. A regulating valve is designed to be stable at any one of a nearly infinite set of positions between open and closed. They are mostly used in control loops so that nonlinearity and friction are corrected by feedback control.
PAGE 94
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L There are at least three permutations of any valve circuit: 1. Steady or pulse output to the pilot solenoid (or whatever, piezoelectric bars are in use). Steady requires one output, pulse requires two. 2. Confirmed position switches for open, closed or both, using one or two inputs. 3. Automatic control or a local selector for Open-Auto-Close using no or two inputs (these are not common).
PAGE 95
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L Double Block and Bleed If the valve absolutely must not leak into the process, then two valves are put in series and the short pipe between them is vented (bled) to an appropriate place. The bleed valve must be shut before the main valves can be opened, and the main valves must both be closed before the bleed valve can be opened. Motorized Valve The actuator is a reversible motor that turns a lead screw that moves the valve stem.
PAGE 96
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L Open-Auto-Close Alarm Variations Those applications that use a local switch with automatic control have a three position switch arranged as Open-Auto-Close. Inputs 1 and 2 are used for confirms, so input 3 is used for Open and input 4 for Closed. No input is required for Auto.
PAGE 97
Reference Manual 00809-0100-4696, Rev AA September 2004 Simple Valve Variations Rosemount 848L A spring return valve with one close confirm: EQ1 contains TON(OR(AND(NOT(DO(1)),NOT(IN(2))),AND(DO(1),IN(2))),100); OUT1 contains DO(1); The fourth similar spring return valve in the same 848L: EQ4 contains TON(OR(AND(NOT(DO(4),NOT(IN(8))),AND(DO(4),IN(8))),100); OUT4 contains DO(4); A bistable valve with both confirms and a local station: EQ1 contains OR(AND(NOT(IN(4)),DO(1)),IN(3)); EQ2 contains TON(OR(AND(NO
PAGE 98
Reference Manual Rosemount 848L Certain materials must not leak through a valve that is supposed to be shut. Three valves are arranged in a leak-proof configuration as shown: 848L/DOUBLEBLOCK.TIF Double Block and Bleed 00809-0100-4696, Rev AA September 2004 All three valves are spring return. V1 and V2 return to closed, V3 returns to open. All 3 valves must have closed confirm switches, which allows two instances per 848L.
PAGE 99
Reference Manual 00809-0100-4696, Rev AA September 2004 Motorized Valve Rosemount 848L The motor runs forward to open the valve and reverse to close it. When the motor is off, the valve cannot move. Both confirms are required. Output 1 causes the motor to run forward, Output 2 is reverse. Only one output must be active at a time. Input 1 confirms that the valve is open and input 2 confirms closed.
PAGE 100
Reference Manual Rosemount 848L F-8 00809-0100-4696, Rev AA September 2004
PAGE 101
Reference Manual 00809-0100-4696, Rev AA 9/17/04 Rosemount 848L Index Numerics B E 2-Inch Pipe Stand Mounting . . . . . . . . . . . . . . . . . . 2-3 Boolean Expressions Valve Control . . . . . . . . . . . . . . F-3 A C Error Handling Logic Equation Syntax . . . . . . .D-4 European Directive . . . . . . . . . . . .B-1 Execution Times . . . . . . . . . . . . . . 3-4 ADVISE_ACTIVE . . . . . . . . . . . . . 3-8 ADVISE_ALM . . . . . . . . . . . . . . . . 3-8 ADVISE_ENABLED . . . . . . . . . . .
PAGE 102
Reference Manual 00809-0100-4696, Rev AA 9/17/04 Rosemount 848L H Hardware Maintenance . . . . . . . . . . . . . . . Communication Check . . . . Power Check . . . . . . . . . . . Reset Configuration . . . . . . Sensor Check . . . . . . . . . . . 4-2 4-2 4-2 4-2 4-2 I I/O Transducer Parameters . . . . . . . . . . . . . . . . C-5 Installation . . . . . . . . . . . . . . . . . . . 2-9 Using Cable Glands . . . . . . . . . 2-9 Using Conduit Entries . . . . . . . 2-10 Instantiation, Block . . . . . . . . . . .
PAGE 103
Reference Manual 00809-0100-4696, Rev AA 9/17/04 Rosemount 848L T Tagging . . . . . . . . . . . . . . . . . . . . . Commissioning . . . . . . . . . . . . . Sensor . . . . . . . . . . . . . . . . . . . Transmitter . . . . . . . . . . . . . . . . Timer Recommendations, Host . . Transients . . . . . . . . . . . . . . . . . . . Transmitter Tag . . . . . . . . . . . . . . . . . . . . . . Troubleshooting . . . . . . . . . . . . . . Foundation Fieldbus . . . . . . . . . Resource Block . . . . . . . . . . . .
PAGE 104
Reference Manual Rosemount 848L Index-4 00809-0100-4696, Rev AA 9/17/04
PAGE 105
Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount and the Rosemount logotype are registered trademarks of Rosemount Inc. PlantWeb is a registered trademark of one of the Emerson Process Management group of companies. All other marks are the property of their respective owners. Emerson Process Management Rosemount Inc. 8200 Market Boulevard Chanhassen, MN 55317 USA T (U.S.