Westermo RM-115S User 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.