Serial Communications Settings; Parameters - Omron CJ Series Connection Manual

6. Serial Communications Settings

This section describes the specifications of parameters and wirings that are set in this
document.

6.1. Parameters

The parameters required for connecting PLC and Inverter using serial communications are
shown below.
Item
Unit number
Address number
(Slave address)
Communications (Connection)
port
Terminating resistor
2-wire or 4-wire
Serial communications mode
Data length
(Transmission character)
Stop bit
Parity (Parity bit)
Transmission rate (Baud rate)
Communication selection
Precautions for Correct Use
This document describes the setting procedures of CJ1W-SCU42 Serial Communications
Unit with unit number 0 and communications (connection) port 1. To connect devices under
different conditions, change the CIO area and the control word of CMND instruction used in
the program. Refer to Section 9. Program for details.
PLC (Serial Communications Unit)
0
-
Port 1 (RS-422/485)
Yes (TERM: ON)
2-wire (WIRE: 2)
Serial Gateway
8 bits
1 bit
No
9,600 bps (Default)
-
6．Serial Communications Settings
Inverter
-
1 (Default)
(C072: Communication Station No.
Selection =1.)
-
No
(Terminating register selector switch OFF)
2-wire (Fixed)
-
8 bits (Fixed)
1 bit (Default)
(C075: Communication Stop Bit Selection
= 01)
No (Default)
(C074: Communication Parity Selection =
00)
9,600 bps (Default)
(C071: Communication Speed Selection
= 05)
Modbus communication (Default)
(C096: Communication Selection = 00)
8