View Full Version : Siemens AG_RECV Buffer Issue

June 8th, 2009, 04:41 PM
Hey Guys!

I've run into a rather annoying little problem with the Siemens AG_RECV block (using a CP343-1) when trying to read data back from an RFID Reader.

It seems as though the NDR bit stays low until the entire buffer is full. At this point my received data will be in variable lengths so I cant really lock down my buffer size. Also, for some reason, if I try and set my buffer size to anything less than 130 Bytes if get a 80B1H error code meaning "Destination" area invalid.

Does anyone happend to have a work-around for this silly silly issue?

Ya just got to love those crazy cats at Siemens...



June 9th, 2009, 05:34 AM
Hi R.K.

I've run into similar problems also. I think this might help:

Link (https://www.automation.siemens.com/WW/forum/guests/PostShow.aspx?HTTPS=REDIR&language=en&PostID=111084) to Siemens forum

We solved the problems by always sending a same length message, from a server in this case.