User Manual
R-GWR SERIES
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Doc: MI00568-1-EN
Page 18
SUPPORTED MODBUS COMMUNICATION PROTOCOLS
7.
The Modbus communication protocols supported are:
Modbus RTU Slave (from the RS485/RS232 port)
Modbus TCP-IP Server (from Ethernet port) max 8 client
For more information on these protocols, see the website:
http://www.modbus.org/specs.php
SUPPORTED MODBUS FUNCTION CODES
7.1.
The following Modbus functions are supported:
Read Holding Register
(function 3)
ATTENTION!
All 32-bit values are contained in 2 consecutive registers
ATTENTION!
Any registers with RW* (in flash memory) can be written up to 10000 times
The PLC/Master Modbus programmer must not exceed this limit
