
Modbus RTU Function Codes
14 Modbus® RTU Serial Communications User Manual 02/13
Table 3-5 DR4500 Digital Output Mapping
Coil Number Instrument Function
1 Alarm Relay #1
2 Alarm Relay #1
3 Control Relay #1
4 Control Relay #2
5 Control Relay #3
6 Control Relay #4
Table 3-6 UDC2300/UDC2500/UDC3200/UDC3300 DO Mapping
Coil Number Instrument Function
1
Control Relay Note 1.
2 Alarm Relay #2
3 Alarm Relay #1
Note 1. The reading of this bit is valid only for
Relay Output Type configurations. Not valid for
current outputs
Table 3-7 Herculine Smart Actuators Digital Output Mapping
Coil Number Instrument Function
1 Alarm Relay #1
2 Alarm Relay #2
3 Alarm Relay #3
4 Alarm Relay #4
Table 3-8 UDC3500 Digital Output Mapping
Coil Number Instrument Function
1 Relay #1
2 Relay #2
3 Relay #3
4 Relay #4
5 Realy # 5
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