Siemens S7-300 Operating Instructions Manual page 204

Programming without SFB 52 and SFB 53
D.4 FC CAM_CTRL (FC 1)
Call parameters
DB_NO
RET_VAL
Return values
The function provides the following return values:
RET_VAL
1
0
-1
Job status
You can read the status of the job execution using the RET_VAL return value and the
JOBBUSY activity bit in the channel DB. You can determine the status of a single job by
evaluating its trigger, done, and error bits.
Job active
Job completed
without errors
Job completed
with errors
Write job aborted
204
Name Data type
INT
INT
BR
1
1
0
RETVAL
1
0
-1
-1
P-type
I Number of the channel DB
O Return value
At least 1 job active
No job active, no error
Error:
Data error (DAT_ERR) or
Communication error (JOB_ERR) occurred
JOBBUSY Trigger bit _EN
1 1
0 0
0 0
0 0
Meaning
Description
Done bit _D
0
1
1
0
FM 352 electronic cam controller
Operating Instructions, 05/2011, A5E01071724-03
Error bit _ERR
0
0
1
1