Date Code 20010719
701 Motor Protection Relay
Modbus
®
RTU Communications Protocol
Controlling Output Contacts & Remote Bits Using Modbus
C.15
Table C.15
Modbus Command Codes
Parameter 1 of Command Code 7 is bit-masked to allow you to manipulate several
Data Regions simultaneously.
Table C.15
Modbus Command Codes
Command
Code
Function
Parameter Definition
Modbus
Function
Code
01
a
Start
No Parameters
06h, 10h
02
a
Stop
No Parameters
06h, 10h
03
a
Emergency
Restart
No Parameters
06h, 10h
04
a
Reset
Trip, Targets
No Parameters
06h, 10h
05
Pulse
Output Contacts
Parameter 1:
1 TRIP
2 OUT1
3 OUT2
4 OUT3
5 ALARM
Parameter 2:
1–15; Pulse duration in minutes
Default to 1 second if not supplied
10h
06
Control
Remote Bits
Parameter 1:
1 Set Remote Bit
2 Clear Remote Bit
3 Pulse Remote Bit
Parameter 2:
0000000000000001 RB1
0000000000000010 RB2
0000000000000100 RB3
0000000000001000 RB4
10h
07 Reset
Data Regions
Parameter 1:
0000000000000001 Demand
0000000000000010 Peak Demand
0000000000000100 Max/Min Meter
0000000000001000 Energy Meter
0000000000010000 Motor Statistics
0000000000100000 Event Data
0000000001000000 Thermal Meter
10h
a
Note:
Command Codes 01–04 are also coil numbers which can be set or cleared using
Function Code 05. Clearing these coils using Function Code 05 is allowed for
compatibility, but has no effect as the relay immediately acts on and clears set coils.
Содержание SEL-701
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