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Programming the FM 453
Operating Modes
System Data
Display data is data/parameters returned by the FM.
OP_DAT1 – additional operating data
PAR_READ – parameters/data
Data is accepted and only processed in the corresponding mode.
x
Data is accepted or processed, as applicable.
–
Data are rejected with error message (see Troubleshooting, Table 11-8 Class 4 No. 1).
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 JOB_RD.IMPOSS = 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 errors)
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
Job no.
Addr. in
user DB
110
354.0
114
366.0
.
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).
T
STE
REF
SM
MDI
x
x
x
x
x
x
x
x
Significance
FM 453 Servo Drive / Step Drive Positioning Module
C79000-G7076-C453-01
See
A/AE
Sec-
tion
x
x
9.3.16
x
x
9.3.17
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