Omron CJ1W-SCU22, Руководство по эксплуатации, Страница: 61 / 478

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1 Introduction
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
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Gene
ral Specifications
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Modbus-RTU Specifications
* Modbus-ASCII Slave Mode is not supported.
z
Supported Commands
Item Description
Mode Modbus-RTU Slave Mode (*)
Baud rate 1,200/2,400/4,800/9,600/19,200/38,400/57,600/115,200/230,400 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
range 1 to 247 (broadcasting: 0)
Frame format Slave address: 1 byte
Function code: 1 byte
Data: 0 to 252 bytes
CRC code: 2 bytes
Function
code (hexa-
decimal)
Function Modbus name
01 Reads multiple bits from the CIO, Work, Holding, or Auxiliary Area of
memory used for CJ-series Units. Read Coils
02 Reads multiple bits from the CIO Area of memory used for CJ-series
Units. Read Discrete Inputs
03 Reads multiple words from the DM or EM Area of memory used for
CJ-series Units. Read Holding Registers
04 Reads multiple words from the CIO, Work, Holding, or Auxiliary Area
of memory used for CJ-series Units. Read Input Registers
05 Writes a bit in memory used for CJ-series Units. Write Single Coil
06 Writes a word in the DM or EM Area of memory used for CJ-series
Units. Write Single Register
08 Executes an echoback test. Diagnostic
0F Writes multiple bits in memory used for CJ-series Units. Write Multiple Coils
10 Writes multiple words in the DM or EM Area of memory used for CJ-
series Units. Write Multiple Registers