Programming the Technological Functions
6-15
FM 353 Stepper Drive Positioning Module
6ES7 353-1AH01-8BG0
S Job request status
You can read the status of the job request in return value RET_VAL and in the
“Write/read job in progress” signals in user data block AW-DB (DBX68.0 and
DBX68.2). You can evaluate the status of an individual job request by evaluat-
ing the Initiate, Ready and Error signals for that job request.
Table 6-2 Job request status
Job Request Status
RET_VAL
(integer)
Jobs in
Progress
(DBX68.0
DBX68.2)
Initiate
Signals
(DBB34...43)
Ready
Signals
(DBB44...53)
Error
Signals
(DBB54...63)
1. Job in progress 1 1 1 − −
2. Job terminated without
error
0 − − 1 −
3. Write job terminated with
error in this job
−1 − − 1 1
4. Write job aborted or not
executed
−1 − − − 1
5. Read job aborted −2 − − − 1
6. Write and Read aborted
or not executed (in the
case of simultaneous job
requests)
−3 − − − 1
− Irrelevant for error evaluation
Processing status
Signal Description
Write not possible
(AW-DB, DBX68.1)
= TRUE; Write request cannot be serviced in this cycle because:
S The axis is not initialized
S Test mode is enabled
S No operating mode is active
S The selected operating mode has not yet been set
In these cases, you can leave the Write request pending or you can cancel it.
The POS_CTRL block resets the signal when all of the above-listed condi-
tions are fulfilled.
Read not possible
(AW-DB, DBX68.3)
= TRUE; Read request cannot be serviced at this time because:
S The axis is not initialized
S No mode has been selected
S Test mode is enabled
In these cases, you can leave the Read request pending or you can cancel
it. The POS_CTRL block resets the signal when all of the above-listed condi-
tions are fulfilled.
Reset status/error
(AW-DB, DBX69.1)
With this signal you can reset all Ready and Error signals prior to processing
of the pending job requests. The signal itself is then reset by the block.
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