Cyclic Function Test (Partial Stroke Test); Stroke Counter - Pepperl+Fuchs FieldConnex F2D0-MIO-Ex12.FF Series Manual

Multi-Input/Output Device
Parameterization and Operation
4.5.6

Cyclic Function Test (Partial Stroke Test)

Prerequisites
The following parameters must be set as a prerequisite for the cyclic function test:
Act. Fail Action parameter. For more information, see chapter 4.5.2.
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Sensor Usage parameter. For more information, see chapter 4.5.3.
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Valve Monitoring parameter > Time Monitoring is activated. For more information, see
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chapter 4.5.5.
"Cyclic Test Open" and "Cyclic Test Closed"
The MIO device provides a function check for the connected valve or actuator within an
adjustable period of time. This way, you can monitor valves or actuator that are rarely triggered
for faults. When active, the MIO device controls the valve or actuator contrary to the current
control until the breakaway point. Then, the MIO device controls the valve or actuator back into
the initial position.
The measured breakaway time is displayed as the last breakaway time measured, and falling
below or exceeding the admissible range of values generates an alarm.
Depending on the operation, the cyclic function test for the valve position "open" or "closed"
can be switched ON or OFF under the Valve Monitoring parameter.
Note that the time monitoring option must be activated in Valve Monitoring in order to use the
cyclic function test.
"Period Cyclic Test"
You can set a time interval for the cyclic function test. The interval can range between
10 seconds and 7 days, 23 hours, 59 minutes and 59 seconds. If the set valve position is not
modified after this time, the device automatically carries out a cyclic function test.
4.5.7

Stroke Counter

The MIO device can monitor the number of strokes of a valve.
In the Valve Monitoring parameter, use the Stroke Counter to activate this function.
A stroke starts in the valve status "open" and continues with a closing and opening procedure.
When activated, the Stroke Counter increases by 1, after the valve is closed and opened again.
This parameter can be initialized with a start value. The current count remains unaffected even
after a voltage failure.
Stroke Counter Limit
You can determine a count as the limit value for the counter function. If the count of the Stroke
Counter exceeds the stroke counter limit entered, the alarm "Maintenance needed now" is
generated. No alarm is given if the stroke counter limit is 0. This way, you can count the number
of strokes without releasing an alarm for a limit value.
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