Counters - HEIDENHAIN iTNC 530 Technical Manual

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8.6.4 Counters

February 2002

The PLC has 48 counters, which you control through special markers with the

symbol C. After you have set a marker from the C0 to C47 range, the iTNC

loads the counter with the value that is saved in machine parameter

MP4120.x. The marker range C48 to C95 indicates whether the count has

expired. With markers C96 to C144 you can start and stop the counter.

MP4020 bit 11 defines whether the counter is defined in PLC cycles or

seconds. In this way, the counters can also be used as timers. With this

definition of counters in PLC cycles, the decimal places are not evaluated by

Logic diagram for counter C1

Preset value in MP4120.1 = 10 (PLC cycles or seconds)

Machine parameters