Siemens SIMATIC S7-1500 Function Manual page 195

An error occurs during the execution of the job
If an error occurs during execution of the Motion Control job, this is indicated in the "Error"
parameter with the value TRUE. The behavior of the "Error" parameter is independent of
reaching the assigned velocity.
Jog mode is controlled by the "JogForward" parameter.
①
The job is started by setting the "JogForward" or "JogBackward" parameter.
②
While the job is active, the "Busy" parameter shows the value TRUE.
③
An error occurs during the execution of the job. When the error occurs, the "Busy" parameter changes to "FALSE",
and "Error" changes to TRUE.
④
When the "JogForward" or "JogBackward" is reset to the value FALSE, the "Error" parameter likewise changes to
FALSE.
S7-1500 Motion Control V13 Update 3
Function Manual, 07/2014, A5E03879256-AC
Jog mode is controlled by the "JogBackward" parameter.
Programming
7.5 Tracking active jobs
195