Purpose
Transmit serial communications using TXDU and RXDU to a CJ1W-SCU42 port 2 module
Problem Explanation/Objective
CJ1W-SCU42 can communicate serially to barcode or other 3rd party devices that has RS232c ports .
Use TXDU to transmit serial command and RXDU to receive serial commands.
Supported devices
CJ1W-SCU42 ver 2.0
CJ2M-CPU31 ver 2.0
CJ1W-PA205R
USB A to USB B cable
C200H-CN220-EU cable
CS1W-CIF41 adaptor
Requirements
CJ1W-SCU42 ver 2.0, CJ2M-CPU31 ver 2.0, CJ1W-PA205R, USB A to USB B cable, C200H-CN220-EU cable
and CS1W-CIF41 adaptor are the hardware devices and Cx Programmer along with Supermon ver 5.0 are the software .
Procedure
1. Launch Cx Programmer and Go Online using a USB A to USB B cable.
2. Create the IO Table selecting by selecting IO Table and Unit Setup, select Options then Create
3. Double click on the CJ1W-CU42 under the Main Rack and populate User Settings, No-Protocol,
8 bits, 1 bit, None, and 9600 as shown below : 
4. Select Transfer [PC to Unit]
5. Program a ladder instruction with MOV and TXDU instructions to populate your Source word, Control word, and Number of Bytes.

6. Program a ladder instruction with MOV and RXDU instructions to populate your Source word, Control word, and Number of Bytes.

7. See attached sample Cx Programmer file and SuperMon software to assist in learning TXDU and RXDU
Date/Revision History
First Review:
Author:
Michael Pesigan, Senior Technical Support Specialist
References
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