Emerson XM678D - 25 Xm678 D Controller Association and Replacement Procedure; Overview; Case Circuit Output Connections; Defrost Synchronization

Overview XM678D Controller Association and Replacement Procedure • 61
25 XM678D
Controller
Association and
Replacement
Procedure
24.1.Overview
The XM678D controller version 2.5 can be associated
with a Case Control Circuit application in E2 to
provide the XM678D with the information necessary
to synchronize Defrost, Lights, and Case Setpoint.
Only the information listed below is sh
a
red between
the Case Control Circuit application and the XM678D
applications. All other configuration must be done in
the XM678D applications, especially for Defrost
Duration, Defrost Wait Time, Defrost Termination,
and Alarming.
24.2.Case Circuit Output
Connections
The Case Control Circuit application uses pointer
connections to send the Case Setpoint, Lights ON/
OFF command, Start Defrost command, Active
Dewpoint, and Rack Fail shutdown information to the
XM678D. See Figure 24-5 and Figure 24-6 for
example pointer connections of:
ACT
IVE SETPT,
LIGHTS, START DEFR OUT, DEW POINT OUT,
and RACK FAIL INV.
24.3.Defrost
Synchronization
START DEFR OUT connection allows
synchronization of the defrost of the XM678Ds
associate with the circuit using the Defrost Schedule
times under the “Defr Times” tab of the circuit. Note:
The Circuit information under the “Defrost” tab is
NOT shared with the XM678Ds.
24.4.Case Circuit Input
Connections
The Case Control Circuit application uses pointer
connections to display the Case Temp, Defrost Status,
and Refrigeration Status information from the
XM678D. See Figure 24-7 and Figure 24-8 for
example pointer connections
o
f: CASE TEMP, CASE
DEFR STATUS, and CASE REFR STATUS.
24.4.1. Associating the XM678D with
Case Control Circuit in E2
NOTE: This applies only to XM678D controllers
version 2.5.
5. 1. Add and commission the XM678D controller
in E2.
From the
E2 controller, press
 and then add the XM678D
controller under the C3: ECT tab. Commission
the device from the Network Summary screen
and configure device address, MODBUS port,
etc.
6. Create a Case Control Circuit application in E2.
Press
(Controller Associations),
and select Case Control Circuit.
Figure 24-1 - Network Setup Menu