Siemens SIMATIC S7-200 - Special Memory Bytes SMB86 to SMB94, and SMB186 to SMB194

SIMATIC Instructions
9-190
S7-200 Programmable Controller System Manual
A5E00066097-02
Table 9-26 Special Memory Bytes SMB86 to SMB94, and SMB186 to SMB194
Port 0
Port 1 Description
SMB86 SMB186
7
MSB LSB
nre00 t cp
0
Receive message status byte
n: 1 = Receive message terminated by user disable command
r: 1 = Receive message terminated: error in input parameters
or
missing start or end condition
e: 1 = End character received
t: 1 = Receive message terminated: timer expired
c: 1 = Receive message terminated: maximum character count
achieved
p 1 = Receive message terminated because of a parity error