Omron SYSMAC CS1W-SCB41-V1 Operation Manual page 63

Specifications
Modbus-RTU Specifications
Note
34
Item
Mode Modbus-RTU slave mode (See note.)
Baud rate 1,200/2,400/4,800/9,600/19,200/38,400/57,600/115,200 bps
Default: 19,200 bps
Data length 8 bits
Parity Odd, even, or none
Default: Even
Stop bits Odd or even parity:1 bit
No parity: 2 bits
Address setting 1 to 247 (broadcasting: 0)
range
Frame format Slave address: 1 byte
Function code: 1 byte
Data: 0 to 252 bytes
CRC code: 2 bytes
Modbus-ASCII mode is not supported.
Supported Commands
Function code
(hexadecimal)
01 Reads multiple bits from the CIO, Work,
Holding, or Auxiliary Area of I/O memory.
02 Reads multiple bits from the CIO Area of
I/O memory.
03 Reads multiple words from the DM or EM
Area of I/O memory.
04 Reads multiple words from the CIO,
Work, Holding, or Auxiliary Area of I/O
memory.
05 Writes a bit in I/O memory.
06 Writes a word in the DM or EM Area of
I/O memory.
08 Executes an echoback test.
0F Writes multiple bits in I/O memory.
10 Writes multiple words in the DM or EM
Area of I/O memory.
Description
Function
Section 1-6
Modbus name
Read Coils
Read Discrete Inputs
Read Holding Registers
Read Input Registers
Write Single Coil
Write Single Register
Diagnostic
Write Multiple Coils
Write Multiple Registers