Serial Communications Settings; Parameters - Omron E5 D Series Connection Manual

6. Serial Communications Settings

This section describes the parameters and cable wiring, which are set up in this guide.

6.1. Parameters

The following parameters are required to connect the PLC and the Digital Temperature
Controller via serial communications.
Setting item
Unit No.
Communications Unit No.
(slave address)
Serial communications port
(connection)
Terminating resistance
2-wire or 4-wire
Serial communications
mode
Data length
(transmission character)
Stop bits
Parity (parity bit)
Baud rate
Protocol macro transmission
method
Communications method
Send data wait time
Precautions for Correct Use
The connection procedure described in this guide assumes that the following Serial
Communications Unit, port and unit number are used.
Model: CJ1W-SCU42
Serial communications port: Port 1
Unit No.: 0
If you connect devices under different conditions, refer to Section 9. Program and create a
program by changing both the CIO area and the control data of the PMCR instruction.
6．Serial Communications Settings
PLC
(Serial Communications Unit)
0
-
Port 1 (RS-422A/485)
Terminating resistance ON
(TERM: ON)
2-wire (WIRE: 2)
Protocol macro
7 bits (default)
2 bits (default)
Even (default)
9,600 bps (default)
Half-duplex (default)
-
-
Digital Temperature
Controller
-
1 (default)
-
-
2-wire (fixed)
-
7 bits (default)
2 bits (default)
Even (default)
9,600 bps (default)
-
CompoWay/F (default)
20 ms (default)
9