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6
.
Serial Communications Settings
8
6. Serial Communications Settings
This section describes the contents of parameter settings and wiring that are all defined in this
document.
6.1. Parameters
The parameters required for connecting PLC and Sensor Controller using the serial
communications are shown below.
Item
PLC
(Serial Communications Unit)
Sensor Controller
Unit number
0
-
Communications port
(Communications type)
Port 2 (RS-232C)
RS-232C (Default)
Serial communications mode
Protocol macro
-
Data length (bit)
8 bits
8bit (Default)
Stop bits (length)
1 bit
1bit (Default)
Parity
None
OFF (None: Default)
Baud rate
38400 bps
38400 (bps) (Default)
Protocol macro transmission method
(Full-duplex / Half-duplex)
Full-duplex
Full-duplex
communications (Fixed)
CS/RS control
-
OFF (Default)
Terminator
-
CR
(
Default
)
Precautions for Correct Use
This document describes the setting procedures of CJ1W-SCU42 Serial Communications
Unit with the unit number 0 and communications (connection) port 2.
To connect devices under different conditions, change the CIO area and the control words of
PMCR instruction used in the program. Refer to
Section 9. Program
for details.
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