ABB CL Series Applications Manual page 148

1SVC 440 795 M0100
Example: Operating hours counter
Operating hours counter for the operating time of a
machine. The time in which a machine (logic relay) is
energized is to be measured.
Circuit diagram display
---------ÄO1
Example: Maintenance meter for different machine
sections
Machine sections have to be maintained after different times
have elapsed. Markers N1 and N2 are the On markers of two
different machine sections. These markers control the
associated operating hours counters. Output Q4 switches on
a warning light if the setpoint of an operating hours counter
has been reached. A keyswitch at input I8 resets the
associated operating hours counter after maintenance has
been completed.
Circuit diagram display
N1-------ÄO2
N2-------ÄO3
O2u------ÄQ4
O3k
I8uO2----RO2
hO3----RO3
Operating hours counter
Parameter settings of
operating hours counter O1
O1 +
S 000000
Parameter settings of
operating hours counter O2
O2 +
S 000500
Parameter settings of
operating hours counter O3
O3 +
S 000800
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