[?]: how to end the RCV status S7-200

michael.fu · Post by **michael.fu** » Tue Dec 23, 2008 2:01 pm

when I used the MicroWin writing a communication program, there is a problem...
using Port0 as free port
using ASCII
define SMB88 & SMB89 as start & end tag
200PLC is RS485 master
use XMT to send message; RCV used as receiving message

when PLC send a command to slave station. if the slave answered right message. the program worked perfect.
but when slave lost or back bad message. then the PLC cant send message any more.
the "XMT" cant work....

i think that is RCV is still working. so port0 cant send message.
then how to end the "RCV" status...