Eaton easy500, easy700 Operating Instructions Manual page 125

4.9.3.3 Example maintenance meter for different machine sections, with text output
The entire machine operating time is to be counted. Machine areas have to
be maintained after different times have elapsed. Markers N1 and N2 are the
On markers of two different machine areas. 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. This should
flash. A keyswitch at input I8 resets the associated operating hours counter
after maintenance has been completed.
The entire machine operation time is to be displayed continuously. The run
time of the machine sections should only be displayed once the maintenance
interval has elapsed.
Circuit diagram display
---------ÄO1
O1-------ÄD4
N1-------ÄO2
N2-------ÄO3
O2u------TT4
O3k
T4-------ÄQ4
O2uI8----RO2
h------ÄD2
O3uI8----RO3
h------ÄD3
Parameter settings of
operating hours counter O2
O2 +
S 000500
Parameter setting of timing
relay T1
T1 Ü
S +
I1 02,000
I2 01,500
T:
Text of text display D3
MAINTENANCE
REQUIRED
HRS:000800
MACHINE 02
Operating instructions 05/10 MN05013003Z-EN www.eaton.com
Parameter settings of operating hours counter O1
O1 +
S 000000
Parameter settings of operating hours counter O3
O3 +
S 000800
Text of text display D2
MAINTENANCE
REQUIRED
HRS:000501
MACHINE 01
Text of text display D4
RUNTIME
MACHINE
HRS:001955
4 Wiring  with
4.9 Operating Hours Counter
121