Eaton easySafety, Manual

Page: 296 / 695

Standard function blocks
292
02/16 MN05013001Z EN
Contact
The contact of the function block is evaluated in the standard
circuit diagram. A closed contact indicates:
Memory requirement
The operating hours counter function block requires 36 bytes
of memory plus 4 bytes per constant at the function block
input.
Operation of the function block
If the enable coil OT…EN is triggered to the 1 state, 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.
Accuracy
The operating hours counter is accurate to the nearest
minute. If the enable coil signal is terminated within a
minute, the value for seconds is lost.
The value range of the operating hours counter is between 0
hours and 100 years.
Parameters Function
OT..Q1
Reaching or exceeding the upper limit setpoint
h
The following operations do not clear the actual value of
the operating hours counter: Operating mode change
RUN, STOP, power ON, OFF, Delete program, Change
program, Load new program.