Omron CJ1W-SCU32 Operation Manual page 61

Modbus-RTU Specifications
Item
Mode
Baud rate
Data length
Parity
Stop bits
Address setting
range
Frame format
* Modbus-ASCII Slave Mode is not supported.
Supported Commands
Function
code (hexa-
decimal)
01
02
03
04
05
06
08
0F
10
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
Modbus-RTU Slave Mode (*)
1,200/2,400/4,800/9,600/19,200/38,400/57,600/115,200/230,400 bps
Default: 19,200 bps
8 bits
Odd, even, or none
Default: Even
Odd or even parity:1 bit
No parity: 2 bits
1 to 247 (broadcasting: 0)
Slave address: 1 byte
Function code: 1 byte
Data: 0 to 252 bytes
CRC code: 2 bytes
Reads multiple bits from the CIO, Work, Holding, or Auxiliary Area of
memory used for CJ-series Units.
Reads multiple bits from the CIO Area of memory used for CJ-series
Units.
Reads multiple words from the DM or EM Area of memory used for
CJ-series Units.
Reads multiple words from the CIO, Work, Holding, or Auxiliary Area
of memory used for CJ-series Units.
Writes a bit in memory used for CJ-series Units.
Writes a word in the DM or EM Area of memory used for CJ-series
Units.
Executes an echoback test.
Writes multiple bits in memory used for CJ-series Units.
Writes multiple words in the DM or EM Area of memory used for CJ-
series Units.
Description
Function
1 Introduction
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
1-21
1