The "Modbus_Serial_Device" object will be displayed.
Select the "General
" tab and set appropriate values for each item.
Item Description
Watchdog
If no valid command is received from the master during the preset time period,
the holding register (%IW) will be set to zero.
Settable value: 500 to 200000
Unit ID
A station number is set.
Settable value: 1 to 247
Holding registers (%IW)
The number of holding registers is set.
Buf
fer size of holding register: 1 to 500
Input registers (%QW)
The number of input registers is set.
Buf
fer size of input register: 1 to 500
7. Select the "Modbus Serial Device I/O Mapping
" tab.
You can allocate variables to holding registers and input registers.
Registers correspond to each access type (function code)
Function code Access type Description
1 Read Coils Holding register
13.3 MODBUS
13-40 WUME-GM1RTXOP-01
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