Programming
CM-2201/CM-2202
©2018 Nelson Heat Tracing Systems
www.nelsonheaters.com
GA2497 Rev.6
14
7.3.8
Display Timeout
This function sets the length of time from the last key
press, to automatically return to the Default Display
information. Selecting “Off’ disables this function.
1.
Display Mode: Advance
2.
Range:5 to 600 seconds, Off
3.
Default: 120 seconds
7.3.9
Modbus Address
This selection sets a unique address to ensure only one
CM- 2201 attempts communications with the master unit
at any time. See Section 8.0 for complete information on
Modbus communications.
1.
Display Mode: Advance
2.
Range: 1 to 255 to accommodate multiple
devices on same network.
3.
Default: 1
7.3.10
Baud Rate
Sets the communication baud rate for the RS485 serial
port. All controllers connected to the same data highway
must operate on the same baud rate.
1. Display Mode: Advance
2. Range: 2400, 4800, 9600, 19200
3. Default: 9600
7.3.11
Reset Module
This selection resets controller memory parameters to
factory default values. If the controller’s memory
becomes corrupt, resetting the module will force the
controller to overwrite each register and may correct
any problems that exist.
1.
Display Mode: Advance
2.
Range: yes, no
3.
Default: no
7.4
Program- System Test
7.4.1
System Test
This message displays the name of the sub-menu when
entered.
1.
Display Mode: Advanced
2.
Range: N/A
3.
Default: N/A
7.4.2
Alarm Output Test
This function is used for testing and commissioning
purposes allowing the alarm output to be forced On either
for a short period of time or continuously. At the end of the
specified time duration, the testing option is
automatically disabled. The alarm test function will not
operate if the alarm configuration is set to disable and the
message “ALARM DISABLED” will appear.
1.
Display Mode: Advanced
2.
Range: 1-24 hours, Disabled, Continuously
3.
Default: disabled
7.4.3
Heater Test
This function overrides heater control for
maintenance purposes. For normal operation, set to
“disable”. If a period of time is selected, the heater is
forced On or Off for the selected interval. If “continuous” is
selected the heater is forced On until “disable” is selected.
1.
Display Mode: Advanced
2.
Range: 1-24 hours, Disabled, On Continuously
3.
Default: disabled
7.4.4
Ground Fault Test
This function will test the ground fault trip function of
the controller to ensure proper operation. When
selected, the controller will generate an artificial
ground fault current; if the ground fault current is
sensed as being greater than 30 mA, the test passes.
The GF test function will verify actual ground fault
current and heater trip. Status of the test will be
displayed as pass or fail. If this test has been
invoked by the “Now” option and it passes, the user is
prompted to reset the ground fault trip, at which time
the load is capable of being re-energized as required. If
this test has been invoked by the “Autotest” option
and it passes, the load is allowed to be reenergized as
required. If this test has been invoked by the Autotest
cycle and it fails, an Autotest alarm is generated but
the load is allowed to be re-energized as required.
1.
Display Mode: Advanced
2.
Range: Autotest cycle, Now, Disabled
3.
Default: Disabled