Omron SYSMAC CP Series User Manual

14 Serial Communications
14-42
CP2E CPU Unit Software User’s Manual(W614)
14-7 Modbus-RTU Slave Function
Modbus-RTU Slave enables to read and write CP2E data from Modbus-compatible masters, such as
host PLCs or host computers, using serial communications.
The serial communication mode is set to Modbus-RTU Slave.
By setting the Modbus-RTU slave address on the CP2E side, the target slave address, function code
and data from the master devices can be transmited.
*1 The data length is always 8 bits.
*2 The number of stop bits is determined by the parity setting.
When setting with parity (even/odd), 1 bit
When setting without parity, 2 bits
*3 The address cannot be set to 0. In commands, 0 is used to indicate broadcast commands.
14-7-1 Overview
Specifications
Item Contents
Mode Modbus-RTU Slave
Baud rate 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200 bps
Data length
8 bits *
1
Parity Odd, Even, None
Stop bits
1 bit (2 bits only when setting to no parity) *
2
Slave addresse
1 to 247 *
3
Frame format Slave address: 1 byte
Function code: 1 byte
Data: 0 to 252 bytes
CRC code: 2 bytes
CP2E CPU UnitModbus-RTU master device
Host PLC
Host computer etc.
Slave
address
Function
code
Communication
data
Slave
address
Function
code
Communication
data

Omron SYSMAC CP Series Specifications

General

Brand	Omron
Model	SYSMAC CP Series
Category	Computer Hardware
Language	English