Westermo RM-115S - Manual (Page 54)

115S Serial I/O Module User Manual
Page 54 June 2011
40202 Serial port baud rate
40203 Serial port parity and stop bit
10. Use the tables below to work out the current communications settings, or write to the
registers using ModScan to change the settings to the desired values. Note that the
module transmission mode should be set to Modbus RTU.
Modbus address 40201, serial port transmission mode:
Setting Register Value
Modbus RTU 0x0101
Modbus ASCII, 8 data bits 0x0201
Modbus ASCII, 7 data bits 0x0202
Modbus address 40202, serial port baud rate:
Setting Register Value
1200 0x000C
2400 0x0018
4800 0x0030
9600 0x0060
14400 0x0090
19200 0x00C0
28800 0x0120
38400 0x0180
57600 0x0240
76800 0x0300
115200 0x0480
Modbus address 40203, serial port parity and stop bit:
Parity Setting Register’s High Byte Value
None 0x00
Odd 0x11
Even 0x22
Stop-bit Setting Register’s Low Byte Value
1 stop bit 0x11
2 stop bits 0x22
11. Once the new comms setting are correct, be sure to change the address switches back
to a non-zero setting for normal operation.