6
.
Serial Communications Settings
8
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
PLC (Serial Communications Unit)
Inverter
Unit number
0
-
Address number
(Slave address)
-
1 (Default)
(C072: Communication Station No.
Selection =1.)
Communications (Connection)
port
Port 1 (RS-422/485)
-
Terminating resistor
Yes (TERM: ON)
No
(Terminating register selector switch OFF)
2-wire or 4-wire
2-wire (WIRE: 2)
2-wire (Fixed)
Serial communications mode
Serial Gateway
-
Data length
(Transmission character)
8 bits
8 bits (Fixed)
Stop bit
1 bit
1 bit (Default)
(C075: Communication Stop Bit Selection
= 01)
Parity (Parity bit)
No
No (Default)
(C074: Communication Parity Selection =
00)
Transmission rate (Baud rate)
9,600 bps (Default)
9,600 bps (Default)
(C071: Communication Speed Selection
= 05)
Communication selection
-
Modbus communication (Default)
(C096: Communication Selection = 00)
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.
Содержание CJ2*-CPU Series
Страница 63: ...58...
Страница 64: ...2015 1115 P641 E1 01...