Wiring with the display system
238
1SVC 440 795 M1100
Parameter display and parameter set for the operating hours
counter function block:
Contacts
OT01Q1 to OT04Q1
The contact switches when the upper threshold value has
been reached (greater than or equal to).
Coils
• OT01EN to OT04EN: Enable coil
• OT01RE to OT04RE: Reset coil
Memory requirement of the operating hours counter
The operating hours counter function block requires 36 bytes
of memory plus 4 bytes per constant on the function block
input.
Function of the operating hours counter function
block
If the enable coil OT…EN is triggered to the state 1, the
counter adds the value 1 to its actual value every minute
(basic clock rate: 1 minute).
If the actual value on QV> reaches the setpoint value of >I1,
the contact OT…Q1 switches for as long as the actual value
is greater than or equal to the setpoint value.
The actual value is retained in the unit until the reset coil
OT…RE is actuated. The actual value is then set to zero.
OT04 +
>I1
QV>
OT04 Operating hours counter number 04
+ Appears in the parameter display
>I1 Upper threshold value in hours
QV> Actual value of the operating hours counter
h
Operating mode change RUN, STOP, Voltage On, Off,
Delete program, Change program, Load new program. All
these actions do not delete the actual value of the
operating hours counter.
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