Emerson E2 XM Series of Case Controllers, Diagnostic Alarms, 12.1 XM670, 12.2 XM679, 12.3 XM678

The RLDS features full two-way communications via an RS485 interface. MODBUS RTU is the communication protocol standard and can be connected directly to an E2 controller version 3.02 and above. The RLDS is dynami- cally licensed for 15 devices for RX/BX/CX 300-500 and 1 for RX100 and CX100 (Same as IRLDS).

6.3.10.1Diagnostic Alarms

Diagnostic Alarm	Descriptions
Box Temp Fault	Chassis temperature is out of range
Bench Temp Fault	Sensor temperature is out of range
Manifold Pressure Fault	Pressure readings out of range
RS-485 Fault	Communication Error
Loop Fault	Current loop is open
Config. Fault	No zones are enabled
Zero Filter Fault	Charcoal filter needs repl.
Gain Set Fault	Gain setting is out of range
A2D Fault	A/D converter is not working
Zone Flow Fault	No flow during sample cycle
Purge Flow Fault	No flow during purge cycle
Over Range Fault	Conc. above measurable range
Zero Range Fault	Sensor voltage outside limits
Clipping Fault	Sensor output voltage too high

Table 6-7-Diagnostic Alarm Outputs

6.3.11Copeland Scroll — K5 Refrigeration Compressor

The Copeland Scroll — K5 Refrigeration Compressor (Lrg Ref Scroll) application can monitor large type com- pressors using the MODBUS network on E2 versions 3.02 and above. The Copeland Scroll — K5 Refrigeration Compressor is supported on E2 CX-400, CX-100 and above. The E2 monitors and records compressor informa- tion, configuration setup, status display, and alarm han- dling. The Copeland Scroll — K5 Refrigeration Compressor will be associated with the suction group from the Compressor Association screen. The scroll can be associated by pressing  - Controller Associa- tions then  - Compressor.

Figure 6-10- Compressor Association screen

6.3.12XM Series of Case Controllers

The XM series is a set of digitalcase controllers for low to medium units. The XM series control refrigeration sole- noids and defrost (electric or hot gas), evaporator fans, lights and have an auxiliary output. These devices are available on E2 version 3.02 and above.

6.3.12.1XM670

The XM670 is high level microprocessor based con- trollers for multiplexed cabinets suitable for applications on medium or low temperature. It can be inserted in a LAN of up to 8 different sections which can operate, depending on the programming, as stand alone controllers or following the commands coming from the other sec- tions. The XM670 is provided with 6 relay outputs to con- trol the solenoid valve, defrost (which can be either electrical or hot gas) the evaporator fans, the lights, an auxiliary output and an alarm output. The devices are also provided with four probe inputs, one for temperature con- trol, one to control the defrost end temperature of the evaporator, the third for the display, and the fourth can be used for application with virtual probe or for inlet/outlet air temperature measurement. Finally, the XM670 is equipped with the three digital inputs (free contact) and are fully configurable.

6.3.12.2XM679

The XM679 is similar to the XM670, but with one relay output to drive pulsed electronic expansion valves. The XM679 also contains two probes that are dedicated for superheat measurement and regulation.

6.3.12.3XM678

The XM678 is similar to the XM670, but with one stepper valve output to drive an electronic expansion valve. The XM678 also contains two probes that are dedi- cated for superheat measurement and regulation.

6-12 • E2 RX/BX/CX I&O Manual 026-1614 Rev 4 5-JAN-2013