Posted 17 Jun 2020 Hey everyone, I have a CJ1M PLC with a CJ1W-SCU21-V1 serial card. It is unit 6 and I am using port 1. I have bit 1659.06 ((1500 + 25 * Unit #) +9, bit 6) as "characters in buffer" but it never comes on (data is being received through the port successfully). It is on No-Protocol mode. Does anyone have any ideas as to how I can detect data in the buffer? Share this post Link to post Share on other sites
Posted 17 Jun 2020 You either set an end code in the setup of the port, or you specify a number of bytes received. If the end code is received or the number of bytes set is received, then this bit turns on. Share this post Link to post Share on other sites