Posted 24 May 2006 Please help. I have to send data (example below ) to a programmable power supply, from a CJ1M PLC serial port to an rs232 port on the Psu. I am new to this level of programming. I want to be able to set the voltage from the ladder. Can someone spare the time to walk me through it?? Best regards. Bob Function: Self-test and test the RAM, ROM. Syntax: *TST? Returns: 0|-300 Examples : *TST? returns 0, if the test is successful. *TST? returns –300, if the test is unsuccessful. *WAI (no query form) Function: WAI prevents the programming instrument from executing further commands or queries until all pending operations are finished. Syntax: *WAI Share this post Link to post Share on other sites
Posted 24 May 2006 TXD-RXD QuickStart programs @ MrPLC.com Share this post Link to post Share on other sites
Posted 24 May 2006 1. Make RS232 cable. Cable shemas you can find in download section. 2. Change settings in CX programmer (PLC Settings/Host Link Port) to Custom communication , Mode RS232C. Baud and format should be same as on psu. 3. Send data on rs232 port using TXD instruction. Share this post Link to post Share on other sites