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Simple Application Controllers
Function Blocks 6
6 - 41
6.18 Hour Meter Block
The Hour Meter is used to track the amount of time that a device has been in operation. This
can be very useful for preventative maintenance schedules or for performing feasibility studies.
The timing starts at the receipt of an Input signal and retains the accumulated time through
system shutdowns or power failures. When the Set Time value is reached, the block Output
will turn ON. The Hour Meter will continue recording time after the Output time is reached. A
signal to the Clear pin will reset the current time value to zero.
Table 6.18: Hour Meter Function Block
1 ) Hour operation time chart
Function
Set Item
Description
I
Input pin for hour meter operation
C
Clear pin for function block
FB
1) Time units are either hh:mm or mm:ss
2) Time setting range:
a) 0-32767 hours with initial value 0
b) 0 - 59 minutes with initial value 0
c) 0 - 59 seconds with initial value 0
Output
1) The output is turned ON after the set time has elapsed.
2) The function block retains the previous value if there is no signal
from the input pin and restarts with this value when the input is given
a signal again.
3) The current time value is reset if the clear pin receives a signal.
4) The following items are available for other function blocks:
a) Set Hour
b) Current Hour
a) Set Minute
b) Current Minute
0 0
0
M
H
O
I
C
P
Input pin I
Input pin C
Output
Start
timekeeping
Suspend
timekeeping
Restart
timekeeping
Start
timekeeping
Start
timekeeping
Restart
timekeeping
Suspend
timekeeping
Timekeeping
Suspending
timekeeping
Timekeeping
Corresponds
with set time
Current value
