026-1218 Rev 0 19-DEC-2012 XM670K-XM679K Controllers for Multiplexed Cabinets Installation and Operation Manual
Emerson Climate Technologies Retail Solutions 1065 Big Shanty Road NW, Suite 100 Kennesaw, GA 30144 USA Phone: 770-425-2724 Fax: 770-425-9319
Table of Contents 1 INTRODUCTION.......................................................................................................................................................... 1 1.1. GENERAL WARNING ..................................................................................................................................................... 1 2 OVERVIEW ...........................................................................................................................................
10.4. DOOR SWITCH INPUT (DOR) ..................................................................................................................................... 20 10.5. START DEFROST (DEF)............................................................................................................................................. 20 10.6. RELAY AUX ACTUATION (AUS) .............................................................................................................................. 20 10.7.
1 Introduction 2 Overview 1.1. General Warning 2.1. General Description Please read the following safety precautions and warnings before using this manual: Models XM670K-XM679K are high level microprocessor based controllers for multiplexed cabinets, suitable for applications on medium or low temperature.
3 User Interface Measurement unit Measurement unit Measurement unit Key Combinations Locks/Unlocks the keyboard Switches mode to programming mode Exits the programming mode Figure 3-1 - XM670K - XM679K Front Panel Table 3-1 - XM670K/XM679K Front Panel Keys and Functions 3.1. Keys and Functions Table 3-1 lists the keys that are found on the front panel of XM670K-XM679K controllers and the function of each: Key 3.2.
3.3. How to Enter the Fast Access Menu 1. Enter the programming mode by pressing the SET and DOWN buttons for a few seconds (wait for the measurement unit to start blinking). 2. The controller will show the first parameter present in Pr1. 1. Press and release the UP button. 2. The First Label will be displayed. Press the UP or DOWN button to navigate the menu. 3.4. How to See the MAX and MIN Temperature Recorded 1. Press and release the UP button. 2. The First Label will be displayed.
3.10. How to Change the Parameter Value 1. Enter the programming mode. 2. Select the required parameter using the UP or DOWN button. 3. Press the SET key to display the parameter value (measurement unit starts blinking). 4. Use the UP or DOWN button to change the value. 5. Press SET to store the new value and move to the next parameter. 6. To exit, press SET + UP keys or wait 15 seconds without pressing a key. NOTE: The set value is stored even when the time-out expires and ends the procedure. 3.11.
4 Fast Access Menu FAST ACESS MENU HM Fast Access Menu to Clock Settings (If present) An Fast Access to Analog Output Reading (If present) SH Superheat Shows the actual superheat value (Only XM679K) oPP Valve opening percentage Shows the actual opening percentage of the valve (Only XM679K) dP1 Probe 1 value displaying Shows the temperature measured by probe 1 dP2 Probe 2 value displaying Shows the temperature measured by probe 2 dP3 Probe 3 value displaying Shows the temperature measur
5 Section Menu This menu allows the user to access to a particular feature of the XM series related to the LAN (Local Area Network) of controllers. Depending on the programming of this menu, a single keyboard can control either the module of the local section of the LAN or ALL. The possibilities are: LOC: the keyboard controls and display the value, the status, and the alarms of the local section of the LAN; and ALL: the command given by the keyboard are effective on all the sections of the LAN. 1.
6.2. To Set Energy Saving Times ILE Energy Saving cycle start during workdays (0 to 23 h 50 min) During the Energy Saving cycle, the setpoint is increased by the value in HES so that the operation setpoint is SET + HES. dLE Energy Saving cycle length during workdays (0 to 24 h 00 min) Sets the duration of the Energy Saving cycle on workdays.
7 Electronic 8 Controlling Loads Expansion Valve Menu (For Model 8.1. Solenoid Valve XM679K Only) 1. Enter the programming mode by pressing the SET and DOWN buttons for a few seconds (measurement unit starts blinking). 2. Press the UP or DOWN key until the controller displays the EEU label. 3. Press SET. You are now in EEV function menu.
Figure 8-1 - Regulation via PI Regulator Opening percentage is the percentage of the cycle period where the valve is open. For example, if CyP=6s (standard value) and the valve is opened at 50%, this means that the valve is opened for 3 seconds during the cycle period. 8.2.1. First Kind of Regulation: Standard Regulation In this case, the Hy parameter is the differential for the standard ON/OFF regulation. In this case, the int parameter is neglected.
8.3.2. Defrost Ending • When defrost is started via RTC, the maximum defrost duration is obtained from the Md parameter and the defrost end temperature is obtained from the dtE parameter (and the dtS if two defrost probes are selected). • If dPA and dPb are present and d2P=y, the controller stops the defrost procedure when dPA is higher than the dtE temperature and dPb is higher than the dtS temperature. At the end of defrost, the drip time is controlled through the Fdt parameter.
9 Parameters List REGULATION rtC Access to CLOCK submenu (if present) EEU Access to EEV submenu (only XM679K); Hy Differential: (0.1 to 25.5°C; 1 to 45°F) This is the intervention differential for setpoint, this value is always positive. Solenoid valve Cut IN is Setpoint Plus Differential (Hy). Solenoid valve Cut OUT is when the temperature reaches the setpoint. Int Integral time for room temperature regulation (Only XM679K): (0 to 255 s) This is the integral time for room temperature PI regulator.
red Remote display: (nP; P1; P2, P3, P4, P5, P6, tEr, dEF) it selects which probe is displayed by the X-REP. P1, P2, P3, P4, P5, P6, tEr= virtual probe for thermostat, dEF= virtual probe for defrost. dLy Display delay: (0 to 24.0 m; resolution 10s) when the temperature increases, the display is updated of 1 °C/ 1°F after this time. rPA Regulation probe A: (nP; P1; P2, P3, P4, P5) first probe used to regulate room temperature. If rPA = nP the regulation is performed with real value of rPb.
tPP Type of Pressure Transducer: (PP - LAn) it sets type of pressure transducer to use: PP= 4 to 20mA pressure transducer or ratiometric transducer 0 to 5V depending on P5C parameter, LAn= the pressure signal arrives from another XM600K; Referred to Pb5 PA4 Probe value At 4mA or At 0V: (-1.0 to P20 bar / -14 to PSI / -10 to P20 kPA*10) pressure value measured by probe at 4mA or at 0V (related to PrM parameter) Referred to Pb5 P20 Probe value 20mA or At 5V: (PA4 to 50.
tod Time out for heater: 0 to 255 (min.) if the defrost probe temperature is bigger than Srt for all tod time the defrost ends although the defrost probe temperature is lower than dtE or dtS. It permits to reduce defrost duration; dtP Minimum temperature difference to start defrost: [0.1°C to 50.0°C] [1°F to 90°F] if the difference between the two defrost probes stays lower than dtP for all ddP time the defrost is activated.
Fnd Fan delay after defrost: (0 to 255 min) The time interval between the defrost end and evaporator fans start. FCt Temperature differential avoiding short cycles of fans (0.0°C to 50.0°C; 0°F to 90°F) If the difference of temperature between the evaporator and the room probes is more than the value of the Fct parameter, the fans are switched on. FSt Fan stop temperature: (-50 to 110°C; -58 to 230°F) setting of temperature, detected by evaporator probe, above which the fan is always OFF.
ALd Temperature alarm delay: (0 to 255 min) The time interval between the detection of an alarm condition and the corresponding alarm signaling. dLU High temperature alarm (defrost probe): (ALC= rE, 0 to 50°C or 90°F / ALC= Ab, ALL to 150°C or 302°F) When this temperature is reached and after the ddA delay time, the HAd alarm is enabled.
DIGITAL INPUTS i1P Digital input 1 polarity: (cL - oP) CL: the digital input is activated by closing the contact; OP: the digital input is activated by opening the contact.
Hd1 First weekly holiday (Sun to nu) Set the first day of the week that follows the holiday times. Hd2 Second weekly holiday (Sun to nu) Set the second day of the week that follows the holiday times. Hd3 Third weekly holiday (Sun to nu) Set the third day of the week that follows the holiday times. ILE Energy Saving cycle start during workdays: (0 to 23h 50 min.) During the Energy Saving cycle, the setpoint is increased by the value in HES so that the operation setpoint is SET + HES.
LSd Remote probe display: this parameter states if the section has to display the local probe value or the value coming from another section: y= the displayed value is the one coming from another section (which has parameter LdS = y); n= the displayed value is the local probe one. LPP Remote pressure probe: n= the value of pressure probe is read from local probe; Y= the value of pressure probe is sent via LAN.
10 Digital Inputs The XM600 series of controllers can support up to three (3) configurable digital inputs that are free of voltage contact (depending on the models). They are configurable via i#F parameter. 10.1. Generic Alarm (EAL) 10.5. Start Defrost (dEF) A defrost will start if the right conditions exist. After the defrost is finished, normal regulation will restart only if the digital input is disabled; otherwise, the controller will wait until the MdF safety time is expired. 10.6.
10.12.Configurable Input Holiday Function (HDY) In Holiday function, the Energy Saving and defrost cycles follow holiday times (Sd1…Sd6). 10.13.Digital Inputs Polarity The digital inputs polarity depends on the I#P parameters: CL (the digital input is activated by closing the contact) and OP (the digital input is activated by opening the contact).
11 Installation and Mounting 12 Electrical Connections The CX660 keyboard should be mounted on a vertical panel, in a 29 mm x 71 mm hole, and secured using the special bracket supplied. The XM670K/XM679K controllers come with a screw terminal block to connect cables with a cross section up to 1.6 mm2 for all the low voltage connections: the RS485, the LAN, the probes, the digital inputs, and the keyboard. Other inputs, power supply, and relay connections are provided with a Faston connection (5.0 mm).
13 RS485 Serial Line Each XM670K/XM679K controller has a direct RS485 connection that enables the controller to be linked to a network line that is MODBUS-RTU compatible with all monitoring systems. 14 How to Use the Hot Key The XM series of controllers can upload or download the parameter list from its own E2 internal memory to the Hot Key using a TTL connector. 14.1. Download (From the Hot Key to the Device) 1.
15 Alarm Signals Message Cause Outputs PON Keyboard enabled Outputs unchanged POF Keyboard locked Outputs unchanged Alarm reset Alarm relay reset nOP Probe not present Compressor output according to parameter Con and COF P1 First probe failure Compressor output according to parameters Con and COF P2 Second probe failure Defrost end is timed P3 Third probe failure Outputs unchanged P4 Fourth probe failure Outputs unchanged P5 Fifth probe failure Outputs unchanged P6 Sixth probe
15.1. EE Alarm The controllers are provided with an internal check for data integrity. Alarm EE flashes when a failure in the memory data occurs. In such cases, the alarm output is enabled. 15.2. Alarm Recovery Probe alarms, P1 (probe1 faulty), P2, P3, P4, P5, and P6 automatically stop 10 seconds after the probe restarts normal operation. Check connections before replacing the probe.
16 Technical Data CX660 KEYBOARD Housing Self-extinguishing ABS Dimensions Case: Front: 35 mm x 77 mm Depth: 18 mm Panel Mount: 29 mm x 71 mm panel cut-out Protection IP20 Frontal: IP65 Power Supply From XM600K power module Display 3 digits, red LED, 14.2 mm H Optional Output Buzzer POWER MODULES Case 8 DIN Connections Screw terminal block ≤ 1.6 mm2 heat-resistant wiring and 5.
NTC probe: -40 to 110°C (-58 to 230°F) Measuring and Regulation Range PTC probe: -50 to 150°C (-67 to 302°F) Pt1000 probe: -100 to 100°C (-148 to 212°F) Resolution 0.1°C or 1°C or 1°F (selectable) Accuracy (ambient temperature 25°C) ±0.
17 UL Ratings Ratings Relay Outputs UL Ratings Terminal Relay Designation Evaporator Fan: 120/240 V, 50/60 Hz, 1/4 HP, 30k cycles 125 V, 50/60 Hz, 1/3 HP, 6k cycles 250 V, 50/60 Hz, 1/2 HP, 30k cycles Terminals 9 and 10 RL1 Compressor: 120 V/240 V, D300 Pilot Duty, 30k cycles Terminals 11 and 12 RL4 Auxiliary (not populated in XM66 series): 120/240 V, 50/60 Hz, 5 A, General Purpose, 6k cycles 120/240 V, 50/60 Hz, 3 A, Resistive, 100k cycles Terminals 18 and 17 RL3 Light: 120 V, 50/60 Hz, 5 A, G
18 Connections 18.1.
18.3.
18.4. XM679K - 24VAC Valves/Wiring Diagram Figure 18-3 - XM679K - 24VAC Valves NOTE: The jumper labeled as JMP is located inside the case of the controller. The JMP jumper should be closed only when driving the 24VAC valve.
19 E2 MODBUS Network Wiring • Connect the MODBUS Network to the RS485 Connector on the E2 PIB board (Belden 8641 recommended). • Note to wire the RS485 +/- polarity at the E2 in the reverse of the XR670K - XR679K devices. • Position the three termination jumpers to the UP (terminated) position to provide RS485 termination at the E2. • Do not connect the shield of the MODBUS network to the E2 PIB center terminal. Instead, use a 100 ohm 1/2 watt resistor to connect the MODBUS cable shield to earth ground.
20 Wiring Layout for Sharing a Pressure Transducer on a LAN MODBUS Network Set E2 to 9600 baud Do not connect the shield of the MODBUS network to the E2 PIB center terminal.
21 Pressure Transducer Setup (XM679K Only) Check for error messages. Error message examples: • dPP = Err: in the Master device, the value of pressure read from the transducer is outside the acceptable range regarding parameters PA4- PA20; is connected incorrectly or it is not configured to parameter P5C. • PPF = reading on the slave device - LAN communication is not functional.
CAUTION! Do not connect the RS485 cable to all the instruments that are already connected on the LAN - only connect the RS485 to the master device of the LAN. NOTE: If pressure is not being shared across the LAN, each XM679K will need its own Pressure Transducer. Please reference Figure 19-1 and Figure 20-1 wiring diagrams.
22 ECT MODBUS Networking to E2s Connecting a XR670K - XR679K controller to an E2 requires the E2 to be version 2.84 or above. Contact Emerson Retail Solutions for upgrade information if the controller is a version before 2.84. 22.1. COM Port Associations - E2 Versions 3.xx and Below sure your E2 is equipped with an RS485 COM Card (P/N 637-4890) and configured in E2 General Services (, Serial tab) to enable COM4 or an E2 Expansion COM Card (P/N 637-4871) to enable COM6.
An E2 has three COM ports that can be assigned for MODBUS communication (COM2). COM ports can only be used for one function; in other words, if COM2 is set up as the I/O network, you cannot connect MODBUS devices to COM2. Ensure your E2 is configured in E2 General Services (, Serial tab) to enable COM4 or COM6. Connect the MODBUS network cable to the threeterminal connector on the COM port you wish to assign as MODBUS. Reverse polarity of +/- on RS485 cable from E2 to the device.
address set up through the front display, and press to select it. A window will open where you can specify the address of the controller. If a network ID has already been selected, its name will be shown next to the network ID in this list. If the network ID you are trying to assign has already been used, you must set the address on this device to a different number that is not being used. Figure 22-6 - Num Network Ctrls: NetSetup Screen 3.
that has the latest version of firmware on it. 22.5. MODBUS Termination Blocks Because the XR670K/XR679K device has no onboard means of termination, use the MODBUS termination block (P/N 535-2711) for termination that can be wired to the end of the cable segment using the three-pin connector. Wire the two signal wires to the outside terminals, and connect the shield to pin 18 of the device, keeping the exposed shield wire length as short as possible (3 inches ideal maximum length).
23 Default Setting Values Label Value Menu SEt 2.0 --- Description Setpoint Range LS - US REGULATION [0.1°C to 25.5°C] [1°F to 45°F] Hy 2.0 Pr1 Differential Int 150 Pr1 Integral time for room temperature regulation CrE n Pr1 Continuous regulation activation LS -30 Pr2 Minimum setpoint [-55.0°C to SET] [-67°F to SET] US 20 Pr2 Maximum setpoint [SET to 150.0°C] [SET to 302°F] odS 0 Pr1 Outputs activation delay at start up 0 to 255 (min.
Label Value Menu Description Pb 5.0 Pr1 Proportional band for superheat regulator rS 0.0 Pr1 Band Offset for superheat regulator inC 120 Pr1 Integration time for superheat regulator PEO 50 Pr1 Probe error opening percentage PEd On Pr1 Probe error delay before stopping regulation OPE 85 Pr1 Start opening percentage Range [0.1°C to 60.0 °C] [1°F to 108 °F] [-12.0°C to 12.0°C] [-12°C to 12°C] [-21°F to 21°F] 0 to 255 s 0 to 100 0 to 239 s - On(240) 0 to 100 SFd 1.
Label Value Menu Description dPE 100 Pr1 Virtual probe percentage (defrost temperature) tdF EL Pr1 Defrost type EdF in Pr1 Defrost mode: Clock or interval Range 0 to 100 (100=dPA, 0=dPb) EL(0) - in(0) rtc(0) - in(1) Srt 150 Pr1 Heater setpoint during defrost [-55.0°C to 150°C] [-67°F to 302°F] Hyr 2.0 Pr1 Differential for heater [0.1°C to 25.5°C] [1°F to 45°F] tod 255 Pr1 Time out for heater dtP 0.
Label Value Menu SOA 80 Pr2 Description Fixed speed for fan Range AMi to AMA SdP 30.0 Pr2 Default Dew Point value [-55.0°C to 50.0°C] [-67°F to 122°F] ASr 1.0 Pr2 Differential for fan / offset for anti sweat heater [-25.5°C to 25.5°C] [-45°F to 45°F] PbA 5.0 Pr2 Proportional band for modulating output [0.1°C to 25.
Label Value Menu Description CoM Cur Pr2 Modulating output configuration AOP cL Pr1 Alarm relay polarity iAU n Pr1 Auxiliary output independent from ON/ OFF state Range CUr(0) - tEn(1) - PM5(2) - PM6(3) oA7(4) OP(0) - CL(1) n(0) – Y(1) DIGITAL INPUTS i1P cL Pr1 Digital input 1 polarity OP(0) - CL(1) EAL(0) - bAL(1) - PAL(2) - dor(3) dEF(4) - AUS(5) -LiG(6) - OnF(7) Htr(8) - FHU(9) - ES(10) - Hdy(11) i1F dor Pr1 Digital input 1 configuration d1d 15 Pr1 Digital input 1 activation
Label Value Menu Description Range Ld2 nu Pr1 Workdays Second defrost start Ld1 to 23.5(143) - nu(144) (hours.10min) Ld3 nu Pr1 Workdays Third defrost start Ld2 to 23.5(143) - nu(144) (hours.10min) Ld4 nu Pr1 Workdays Fourth defrost start Ld3 to 23.5(143) - nu(144) (hours.10min) Ld5 nu Pr1 Workdays Fifth defrost start Ld4 to 23.5(143) - nu(144) (hours.10min) Ld6 nu Pr1 Workdays Sixth defrost start Ld5 to 23.5(143) - nu(144) (hours.
Label Value Menu Description Range ot 0.0 Pr2 P1 calibration P2C NtC Pr2 P2 configuration oE 0.0 Pr2 P2 calibration P3C NtC Pr2 P3 configuration o3 0.0 Pr2 P3 calibration P4C NtC Pr2 P4 configuration o4 0.0 Pr2 P4 calibration P5C 420 Pr2 P5 configuration o5 0.0 Pr2 P5 calibration P6C PtM Pr2 P6 configuration o6 0.0 Pr2 P6 calibration CLt --- Pr1 ON/OFF percentage (C.R.O.
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