Siemens ET 200S 1SI Function Manual page 42

Function blocks of the ET 200S 1SI serial interface module
3.11 Application example for the ET 200S 1SI serial interface module
can be sent if the "myExecSend" input signal detects a signal change from FALSE to TRUE.
If an error occurred during the transfer ("mySendError" = TRUE), the error code is stored in
the "mySendErrorId" variable. The error signals are deleted when you set input "myExecSend"
= FALSE.
If the signal state at the "myAbortSend" or "myAbortReceive" input is TRUE, the send request
or receive request, respectively, is aborted. If the signal state remains TRUE, sending and
receiving of data is disabled.
42
Supplement to the ET 200S 1SI serial interface module
Function Manual, 01/2015, xxx