July 2013 9.6 Operands 1751
9.6.4 Counters
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 counter 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
MP4120.x.
Example:
Logic diagram for counter C1
Preset value in MP4120.1 = 10 (PLC cycles or seconds)
Set counter Counter is
running
Start counter Machine parameters
C0 C48 C96 MP4120.0
C1 C49 C97 MP4120.1
C2 C50 C98 MP4120.2
C3 C51 C99 MP4120.3
C4 C52 C100 MP4120.4
C5 C53 C101 MP4120.5
C6 C54 C102 MP4120.6
C7 C55 C103 MP4120.7
C8 C56 C104 MP4120.8
C9 C57 C105 MP4120.9
C10 C58 C106 MP4120.10
C11 C59 C107 MP4120.11
C12 C60 C108 MP4120.12
C13 C61 C109 MP4120.13
C14 C62 C110 MP4120.14
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