LTE SERIES TRANSMITTERS Pulse Input, Ethernet & Isolated 4-20 mA Outputs USER MANUAL LAUREL Electronics Inc. 3183-G Airway Ave, Costa Mesa, CA, 92626, USA Tel: (714) 434-6131 • Fax: (714) 434-3766 • Website: www.laurels.
1. ORDERING GUIDE Configure a model number in this format: LTE60FR Transmitter Type LTE..Pulse input transmitter with 4-20 mA, 0-20 mA or 0-10V isolated analog output, isolated Ethernet serial data output (Modbus or Custom ASCII protocol), two isolated solid state relays, and isolated transducer excitation output. Default jumpered for 10V excitation. VF1 ............................. .. 4-20 mA Process Input VF2 ............................... .. 0-1 mA Process Input VF3 ................................. .
2. TABLE OF CONTENTS 1. ORDERING GUIDE ............................................................................................................ 2 2. TABLE OF CONTENTS ....................................................................................................... 3 3. COMPLEMENTARY MANUALS ......................................................................................... 4 4. PRODUCT OVERVIEW...........................................................................................
3. COMPLEMENTARY MANUALS This manual covers LTE Series DIN rail transmitters with isolated Ethernet and 4-20 mA outputs, dual relays, and pulse inputs to the microcomputer. The signal conditioners be for dual pulse inputs, for quadrature, or for an analog signal (4-20 mA, 0-1 mA or 0-10V), which is converted to a pulse input by a voltage-to-frequency converter. This manual covers hardware aspects such a pinout and on-board jumpers, and transmitter setup such as scaling and relay setpoints.
4. PRODUCT OVERVIEW LTE Series counter transmitters duplicate the signal conditioning and signal processing features of our 1/8 DIN panel-mounted counters for exceptional performance at high read rates. Signal sources are accommodated by three signal conditioner boards, which are the same as for our panel-mounted counters: • Dual-channel pulse input signal conditioner (for frequency, rate, total, arithmetic combinations of two channels, stopwatch, timer, phase angle, duty cycle).
5. RECEIVING & UNPACKING YOUR TRANSMITTER Your transmitter was carefully tested and inspected prior to shipment. Should the transmitter be damaged in shipment, notify the freight carrier immediately. In the event the transmitter is not configured as ordered or is inoperable, return it to the place of purchase for repair or replacement. Please include a detailed description of the problem. 6.
. LTE TRANSMITTER MAIN BOARD JUMPERS & FIELD WIRING E1 E4 P5 Signal input & excitation output Signal conditioner board RJ45 E2 P4 Analog Ana out output (standard) Ana out + Alarm 2 P3 Solid state Alarm 2 relays (normally Aalrm 1 open, standard) Alarm 1 1 2 1 2 3 4 d c b a a b E3 b Ethernet a E7 c b a 3 Earth GND 2 AC neut or -DC 1 AC high or +DC P1 Power input An RJ45 Ethernet connector allows the transmitter to be connected directly to a computer, router, switch or hub via an Ethernet cabl
P6 - SIGNAL INPUT DETAIL PROCESS / TOTALIZER SIGNAL INPUT Single Powered Sensor Input DC & Externally Powered Process Excitation return + Excitation - Signal input + Signal input 1 2 3 4 -DC +DC 2-Wire Process Transmitter Excitation return + Excitation - Signal input + Signal input 1 2 3 4 DUAL CHANNEL PULSE SIGNAL INPUT ..
8. PROGRAMMING YOUR TRANSMITTER OVERVIEW LTE transmitters are easily programmed by connecting them to the same LAN as a PC or by connecting them directly to a PC with an Ethernet cable, and then running Instrument Setup Software on the PC. This MS Windows based software allows Node and Device discovery, uploading, editing, downloading and saving of setup data, execution of commands under computer control, listing, plotting and graphing of data, and computer prompted calibration.
Upon clicking on Ethernet for the first time, you may be presented with the Windows Security Alert shown below. Click on Unblock, and IS software will be launched. If you ever click on Keep Blocking, IS software will not be able to establish Ethernet communications. You will then need to restore Windows Firewall defaults by clicking on Control Panel => Windows Firewall => Advanced => Restore Defaults. The Node Discovery tab under Node Setup will open once you have passed the Windows Firewall.
Click on the Device Discovery tab, and all Devices attached to your Node will be listed. With an LTE transmitter, the transmitter will be the only Device listed. With a device server Node, there can be up to 30 Devices (meters and transmitters) on an RS485 bus. Please see our Ethernet manual. Highlight your Node, and you will be able to assign a descriptive name to it, such as Tank Farm. The default name is the Node’s unique MAC address.
Click on the Advanced Settings tab, and you will be given the opportunity to change the Node’s TCP and UDP Port settings. Press Get to retrieve settings from the Node to the PC. Press Put to write settings from the PC to the Node. If a browser is to access our Nodes on a remote LAN over the Internet, port forwarding must first be set up for the router that controls the remote LAN. The default port numbers programmed into our Nodes are UDP port 63179 for Node discovery and TCP port 502 for Modbus TCP.
To reach the above Input+Display tab screen, follow this procedure: 1) Highlight your device under the Device Discovery tab. 2) Click on the Main Menu button. A new Counter Main Menu window will open with a help screen. Click on Counter in the top menu bar. Our pulse input transmitters and counters use the same software. While a scaled digital reading is not displayed by transmitters, it is used internally. 3) Click on Get Setup to retrieve the setup data currently in the transmitter.
Click on the Scaling tab to scale your transmitter. The actual screen will vary depending on the detected signal conditioner board, signal input and signal function, as selected under the Input+Display tab. Press the F1 key for help with highlighted items. Click on the Filter tab to set to set up filtering for your readings. The filter time constant can be automatic, be specified in seconds, or be turned off. The adaptive threshold modifies the time constant in response to noise.
Click on the Relay Alarms tab to set up your transmitter’s two solid state relays, which are standard. Press the F1 key for help with highlighted items. Click on the Analog Out tab to scale your analog output, which is standard. Under Range, select 0-20 mA Current, 0-10V Voltage, or 4-20 mA. Type in your Lo Range Reading and Hi Range reading. These will create the two endpoints of your analog output range. Press the F1 key for help with highlighted items.
PULL-DOWN MENU FEATURES • The File pull-down menu allows you to save setup files to disk by pressing on Save Setup and to open setup files from disk by pressing on Open Setup. Opened setup files can then be edited on the PC, be saved to disk, and be downloaded into Devices by using DPM => Put Setup. • The Commands pull-down menu allows you to execute certain functions by using your computer mouse. This menu will be grayed out unless a Get Setup has been executed.
Graph • The Jumpers pull-down menu shows jumper positions for the selected signal conditioner boards and the main board, duplicating information in this manual.
9. OPENING YOUR TRANSMITTER CASE WHEN TO CHANGE JUMPERS Most users will never have the need to open the transmitter case. Our transmitters are shipped fully jumpered and ready for scaling. The signal conditioner type and range are specified by the model number on the transmitter label. To select a different signal conditioner range, you may open the transmitter case and change jumper settings. Your selected range should encompass your maximum expected signal levels.
10. DUAL CHANNEL PULSE INPUT SIGNAL CONDITIONER BOARD This signal conditioner board is used for the frequency, rate, period, timing, phase angle, or duty cycle functions. The board needs to be configured via jumpers for the input signal type and level. It is recognized by Instrument Setup software, which will bring up the applicable menu items for the Input Option “Dual Sig Cond.
Function Block Jumper Setting Frequency Response A0 & B0 b a Bias Resistor A1 & B1 a b Contact Debounce A4 & B4 b a, c c 1 MHz max 30 kHz max 250 Hz max 10 kOhm pull-up to 5V 10 kOhm pull-down to -5V None 3 msec 50 msec Common Jumper Settings Input Type Logic levels NPN open collector PNP open collector Contact closures Line frequency Turbine flow meter Vmax 250V NA NA NA 250V 250V A0 & B0 A1 & B1 A2 & B2 A3 & B3 A4 & B4 b b a or b b b a b a - a a a b a - b b b a, c a, c b RATE & FREQUENCY
• Rates A+B, A-B, AxB, A-B, A/B, A/B-1 (Extended counter) can output arithmetic combi- nations of Rates A and B (Item #1), Rate A (Item #2), or Rate B (Item #3). With rates A and B scaled to produce a ratio close to 1 and an offset of -1, the special combination A/B-1, called “Draw,” can output percentage changes, such as elongation of material as it passes between rollers. PERIOD MODES The inverse of frequency. Normally expressed in seconds.
together and selecting a positive or negative edge to start (Slope A) and the opposite polarity edge to stop (Slope B). If multiple start and stop pulses occur during the Gate Time, the displayed value is the average of pulse widths. The value is updated at the end of each Gate Time. With a scale factor of 1, one count is one microsecond. • Stopwatch A to A times individual events applied to Channel A (Item #1) and the accu- mulated “Grand Total Time” of all events since last reset (Item #2).
11. V-TO F CONVERTER SIGNAL CONDITIONER BOARD This process receiver signal conditioner board converts 0-1 mA, 4-20 mA or 0-10 V analog process signals to a frequency signal, which is then processed mathematically by the counter main board to produce an internal reading of rate, total (time x rate), or 1/rate (time based on rate). Square root extraction is selectable in software.
12. QUADRATURE SIGNAL CONDITIONER BOARD This signal conditioner can be used for quadrature position (Basic or Extended main board) or for quadrature position and rate (Extended main board). Two quadrature signals, which are 90º out of phase, are applied to the Channel A and B inputs. Their phase relationship determines whether the count is clockwise (+) or counterclockwise (-). A zero index signal may be applied to a Z Channel as a position reference.
Phase for Up Count E7 A positive, negative B transition (A leads B) A positive, positive B transition (B leads A) none a Count-by Options E9 X1 = positive edge of A input X2 = positive & negative edges of A input X4 = positive & negative edges of A & B inputs none a b Zero Index Polarity E8 Positive Negative c none Zero Index ANDing Zero Index (no ANDing) Zero Index AND /A Zero Index AND /B Zero Index AND A Zero Index AND B Zero Index AND /A AND /B Zero Index AND /A AND B Zero Index AND A AND /B
13. DUAL RELAY OPERATION Dual solid state relays are standard and can operate in a basic alarm mode, in a hysteresis band mode, or in a deviation band mode. Setpoint operation is referenced to the digital reading in engineering units that is internal to the transmitter.
14. INPUT SIGNAL FILTERING A moving average filter is selectable in software to process the internal digital readings, which are taken at 60/sec with 60 Hz power and 50/sec with 50 Hz power. Eight settings are selectable with t equivalent RC time constants from 0.08 sec to 9.6 sec. The longer time constants provide superior noise filtering at the expense of fast response time.
17. MODBUS PROTOCOL TRANSMITTER COMMUNICATIONS 1.0 GENERAL The Modbus capability conforms to the Modbus over Serial Line Specification & Implementation guide, V1.0. Both the Modbus RTU and Modbus A*SCII protocols are implemented. This 5-page manual section presents key programmable Modbus features. Our detailed Modbus manual can be downloaded from http://www.laurels.com/downloadfiles/modbus.pdf Modbus RTU Baud Rate........... 300, 600, 1200, 2400, 4800, 9600 or 19200 Data Format .......
4.0 SUPPORTED FUNCTION CODES FC03: Read Holding Registers Reads internal registers containing setup parameters (Scale, Offset, Setpoints, etc.) FC10: Write Multiple Registers (FC10 = 16 dec) Writes internal registers containing setup parameters (Scale, Offset, Setpoints, etc.) FC04: Read Input Registers Reads measurement values and alarm status. Returns values in 2's Complement Binary Hex format without a decimal point. The displayed system decimal point can be read with FC03 at address 0057.
Hex Sub Function Code Data Send Response Data 00 00 Any Same as sent 00 01 Description Returns Query Data (N x 2 bytes). Echo Request. Restarts Communications. If in the Listen-Only mode, no response occurs. Takes Slave out of the Listen-Only mode and one of the following: Clears communications event counters. Does not clear communications event counters. FF 00 00 00 FF 00 00 00 00 04 00 00 None Forces Listen-Only.
5.0 SUPPORTED EXCEPTION RESPONSE CODES Code Name Error Description ---- -------------------- -----------------------------------------------------01 Illegal Function Illegal Function Code for this Slave. Only hex Function Codes 03, 04, 05, 08, 10 (dec 16) are allowed. 02 Illegal Data Address Illegal Register Address for this Slave. 03 Illegal Data Value Illegal data value or data length for the Modbus protocol. 04 Slave Device Failure Slave device failure (eg. Transmitter set for external gate). 6.
Modbus ASCII Format FC Action 03 03 Byte Number 1 2 3 Request Response : : MA MA FC FC RA RA NR NR LRC CR NB DD* DD* LRC CR LF LF 04 04 Request Response : : MA MA FC FC RA RA NR NR LRC CR NB DD* DD* LRC CR LF LF 05 05 Request Response : : MA MA FC FC RA RA RA WW WW LRC CR RA WW WW LRC CR LF LF 08 08 Request Response : : MA MA FC FC SF SF SF SF WW WW LRC CR DD DD LRC CR LF LF 10 10 Request Response : : MA MA FC FC RA RA RA RA NR NR : MA FC +80 EC LRC CR Excepti
18. CUSTOM ASCII PROTOCOL TRANSMITTER COMMUNICATIONS 1.0 SERIAL COMMUNICATION FORMAT Mode ................ Full Duplex (Separate transmit and receive lines) and Half Duplex (RS485 only) Baud Rate ......... 300, 600, 1200, 2400, 4800, 9600, 19200 selectable with Instrument Setup software. Parity ................ None Word length ...... 8 data bits Stop bit ............ 1 The Custom ASCII protocol is simpler than the Modbus protocol. This 5-page manual section provides some of its key programmable features.
listing and analysis, or when data is supplied to a Remote Display in a Master-Slave configuration. Values are transmitted in a continuous string with no intervening spaces. If the 5th digit in is set to 1 using Instrument Setup software, the termination characters of and optional appear after each value. If the 5th digit is et to 0, the termination characters appear only once at the end of the string. In either case, if included, the coded character appears at the end of the last value only. 3.
All commands begin with “*” followed by the meter address, then a command letter followed by a sub-command number or letter. Additional characters may be appended. All commands terminate with ( ignored). Char # Character 1 2 3 4 * 0-V A-Z 0-U Description Command Identifier. Recognition Character. Device Address. 0 addresses all devices, 1-V specific devices. Command Function Sub-command. Number of Bytes of RAM or Words (2 Bytes) of non-volatile memory data being transferred.
Reset Functions, DPM Transmitter Cold reset Latched alarms reset Peak value reset Remote display reset Valley reset Tare function Tare reset 6.0 *1C0 Reads NVMEM into RAM locations after RAM is zeroed. *1C2 *1C3 *1C4 *1C9 *1CA *1CB READING AND WRITING TO RAM AND NONVOLATILE MEMORY CHAR 1, 2: The Recognition character and Meter Address Code are the same as shown in previous table.
General, Reading and Writing Ram Memory Data RAM memory data is read and written as a continuous string of bytes consisting of 2 hex characters (0-9,A-F) per byte. Included in the command are the total number of bytes to be transferred and the most significant address in RAM of the continuous string of bytes. The format is: Read lower RAM data Write lower RAM data Read upper RAM data Write upper RAM data where: n aa *1Gnaa *1Fnaa *1Rnaa *1Qnaa is the number of bytes to be read or written.
19. SPECIFICATIONS, LTE SERIES PULSE INPUT TRANSMITTERS Mechanical Case dimensions..........................................................................................120 x 101 x 22.5 mm Case mounting................................................................................ 35 mm DIN rail per EN 50022 Electrical connections ..............................................................Detachable screw plug connectors Environmental Operating temperature.............................................
DUAL CHANNEL SIGNAL CONDITIONER Crystal Accuracy at 25ºC....................................................................................................±2 ppm Crystal Tempco...................................................................................................±1 ppm/degree C Long-Term Drift of Crystal.........................................................................................±5 ppm/year Signal Types ....................
20. WARRANTY Laurel Electronics Inc. warrants its products against defects in materials or workmanship for a period of one year from the date of purchase. In the event of a defect during the warranty period, the unit should be returned, freight prepaid (and all duties and taxes) by the Buyer, to the authorized Laurel distributor where the unit was purchased. The distributor, at its option, will repair or replace the defective unit.
