11 – 116 HEIDENHAIN Service Manual iTNC 530
PLC main page
On this page you see, e.g.:
Which PLC main program is running
Which PLC error table is used
Availability of memory on the PLC partition
The PLC utilization
The range of non-volatile PLC markers and words (or bytes)
The processing time of the PLC (time for one PLC scan) is given as a percentage:
100% is the equivalent of a run time of 1 ms at a cycle time of 21 ms.
Depending on the currently running machine functions and the PLC program used, also
values considerably higher than 100% may be displayed for the PLC utilization. You do not
have to take any measures!
Only when the permissible PLC utilization is superseded, the error message
PLC: time out --> Contact your machine manufacturer!
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