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6. Modbus and Modbus TCP/IP
PET-AR400 support Modbus protocol that allows you to access terminals data via Ethernet and
communicates using a master-slave technique in which only one device (the master) can initiate
transactions (called queries). The other devices (slaves) respond by supplying the requested data
to the master, or by taking the action requested in the query.
Modbus Map
Modbus devices include a Register Map.
The users should refer to the register map to operate properly.
Coil Register (0xxxx) address table
Address
Points
34
1
36
1
40
1
112
1
PET-AR400 User Manual
Description
IEPE input data high/low
WORD arrangement
Clear reboot count
Set the AI Data format
Reboot the module
V1.0.0
Point
Range
0: low WORD, high
WORD
1
1: high WORD, low
WORD
1
1: Reset
0: 2's comp HEX
1
1: Engineering unit
1
1: Reboot
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Type
R/W
W
R/W
W
P.45
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