RXDU (255) Serial Port Receive Function Help!

[netdomain 0]

Hello all, I am using a RXDU Function on CJ2M Processor. If I understood the manual correctly, I can only receive upto 256 bytes of data with this function. Here's my problem. I have a barcode scanner attached to the plc, which sends around 350 bytes of data. How can I receive all that without loosing any of the data? When the trigger on barcode is activated, it sends all that 350 bytes of data to the plc port 1. Can I receive data in parts? Lets say 200 bytes in first attempt and then another 150 bytes again? Any help? Thankyou very much!

[james_applied 0]

You will need to learn protocol macro. This will allow you to recieve a 1000 bytes of data max. I think you need a SCU21 card as i am unsure if the build in RS232 port can use protocol macro. (RS232 port can receive with the simpler RXD command)

[BobB 58]

Definately need an SCU21 or 31 - the built in port is restrictive.