OM WGS-5 WGS 130A to 190A 65
Oil Heater Control
The oil heater shall be on when the compressor is not running AND the oil level input is
closed for 15 seconds. This output will turn off immediately when either the oil level
switch opens or the compressor state is no longer off.
Starter Communications
The Modbus protocol is used to establish communications between the compressor starter
and the circuit controller on the supervisor port, with the circuit controller acting as the
master and the starter as the slave.
Table 20, Parameters to be Read/Written:
Register Description R/W Range Units
1020 Starter Control R/W
Bit Mask
0: Run/Stop
1: Fault Reset
-
1021 Starter Status R
Bit Mask
0: Ready
1: Running
2: UTS
3: Alarm
4: Fault
5: Lockout
-
1026 Avg Current R Amps
1027 L1 Current R Amps
1028 L2 Current R Amps
1029 L3 Current R Amps
1032 Avg Voltage R Volts
1033 L1-L2 Voltage R Volts
1034 L2-L3 Voltage R Volts
1035 L3-L1 Voltage R Volts
1037 PF R
-99 to 100 (in 16 bit two’s
compliment signed format)
0.01
1038 KW R KW
1039 KVA R KVA
1045 Motor FLA R/W 1-9999 Amps
1046 Motor RLA R/W 1-9999 Amps
1057 Ground Fault Trip Enable R/W
0: Disabled
1: Enabled
-
1058 Ground Fault Trip Level R/W 1-100 % RLA
1078
Fault Code – Most Recent
Fault Log Entry
R -
Read-only parameters are displayed at the circuit controller, and sent over pLAN to the unit
controller where they will also be displayed. Read/write parameters are accessible at the
circuit controller only. These read/write parameters are changeable when the starter
communication is working and the proper password is active.
Starter Faults
Starter faults can be viewed from the unit controller. Some starter faults will be
implemented as unique alarms, and others are grouped into a generic starter fault alarm.
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