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FM 351 Positioning Function Module
EWA 4NEB 720 6001-02
Per channel always only one mode block may be called and active.
For each module you must ensure that:
Always only one FC for the writing of data is called and active.
Parallel to this, one FC for the reading of data is called and active.
You must prevent the parallelism of a number of function calls and writing
FCs by using suitable interlocking measures. Have a look at the example on
the enclosed diskette.
You communicate with the FM 351 through the FC calls. In order that the
data transfers and control processes can run without errors, the FCs contain
parameters which inform you of the status of the process.
You start a job with the in/out parameter IN_**** (present in all FCs which
write data).
While ever this parameter is set, the FM 351 has not executed the job.
This is particularly important for all writing functions, because you may call
a new write function only when this parameter has been reset.
The in/out parameter IN_**** is reset by the relevant FC.
Other in/out parameters in all mode FCs are the parameters START, STOP,
DIR_N, DIR_P.
You interrogate the data transfer status for each write FC with the parameter
JP_****.
Decentralized
Operation
Interlocking the
FC Calls
Duration of the
Call
Data Transfer
Status
Programming the FM 351
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