Siemens SIMATIC S7-300 Manual page 96
Fm 354 servo drive positioning module
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Programming the FM 354
Read job status
The status of a read job is indicated in the user DB (in data byte DBB3).
Bit in JOB_RD
(DBX3.)
.BUSY, 0
= 1, read job busy
This bit is set by FC RD_COM as soon as it starts processing a read job
(JOB_RD.NO > 0 and STATUS_RD.IMBOSS = 0)
This bit is cleared by FC RD_COM as soon as the read job has finished running
(JOB_RD.NO = 0).
.DONE, 1
= 1, read job finished
This bit is set by FC RD_COM as soon as it has finished a read job
(also with error and unknown job)
This bit is cleared by FC RD_COM when a new read job begins. You
can clear this bit manually
.IMPOSS, 2
= 1, Read job not possible at the present time
Read job processing is not possible:
–
–
–
In this case, you can leave the read job (JOB_RD.NO) or
delete it. FC RD_COM clears the bit when all the above conditions have been met.
.UNKNOWN, 3
= 1, read job unknown
The read job (JOB_RD.NO) which you specified is not within the known range
(see error evaluation). FC RD_COM clears this bit as soon as
JOB_RD.NO contains a valid number. The unknown number is retained until then.
Error evaluation
Errors which occur are indicated in the binary result (BIE = 0).
Possible errors are:
6-16
.
because the axis is not parameterized
because no mode is preselected
because test mode is active
Unknown read job (see JOB_RD.UNKNOWN)
Data transfer error during communication with SFC 59 "RD_REC". The
error is returned in the output parameter RET_VAL (see reference manual
System Software for S7-300/400; System and Standard Functions).
Significance
FM 354 Servo Drive Positioning Module
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