Siemens SIMATIC FM 453, Manual

Page: 103 / 380

6-7
FM 453 Servo Drive / Step Drive Positioning Module
C79000-G7076-C453-01
This function works together with a user DB. The structure of the user DB
can be found in the library FMSTSVLI in data type
UDT 1. You need one user DB for each channel which contains entries for
addressing the FM 453 and the data for the individual functions of the FM
453. The DB number is passed when you call the FC with the DB_NO pa-
rameter.
according to job no.
What does the user have to do?
What is done by the
User program User DB
Write job no.
Status of FC 2
Read job no.
Status of FC 3
Control signals
Checkback signals
System data –
data/values for
write jobs
System data –
data/values
returned by the
FM 453
…
Scan/clear
Set/clear
“edge generation”
of R+, R–, ST, de-
pending on mode
Transfer to FM
Transfer from FM
Transfer system
data to FM
according to job no.
FC 2? FM 453
Set mode and correspond-
ing control signals
Evaluate mode and corre-
sponding checkback signals
Enter system data
1)
1) Before the appropriate write job no. is set in the user DB, the system data to be written
must be entered.
e.g. write job possible
Evaluate status
4.
3.
1.
2.
Errors which occur are indicated in the binary result (BIE = 0).
Possible errors are:
S
Unknown write job (see JOB_WR.UNKNOWN)
S
Data transfer error during communication with SFC 58 “WR_REC”. The
error is returned in the output parameter RET_VAL (see reference manual
System Software for S7-300/400; System and Standard Functions).
S
The transferred data are verified and interpreted by the module. If a data
error occurs, CHECKBACK_SIGNALS.DATA_ERR in the user DB
structure is set to “1”. Further information on data errors can be found in
the parameterization tool in the menu Test
" Troubleshooting and in Sec-
tion 11.
Principle of
Operation
Error Evaluation
Programming the FM 453