Panasonic GM1 User Manual page 560

13.3 MODBUS
Select the "General" tab and set appropriate values for each item.
Item
Slave address [1..247]
Response timeout (ms)
[2..65535]
10.
Select the "Modbus Slave Channel" tab.
11.
Click the [Add Channel] button.
The "Modbus Channel" dialog box will be displayed.
Enter information for channels to be used. Up to 100 channels can be set.
13-34
Description
Specifies the address (station number) of the slave device
Waiting time for response from slave
* The response timeout value for the master device is overwritten.
WUME-GM1RTXOP-01