Festo CMSH - Page 62

62
Festo — CMSH — 2021-10
Commissioning
7.2.8.2 ‘Counter’ menu
Menu option Description
Operating time The current value of the operating hours counter is displayed in
this area. This counter cannot be reset.
Actual position The current values of the counters for movements, changes in
direction and the total distance of the actual position are dis-
played in this area. These counters cannot be reset.
Target position The current values of the counters for movements, changes in
direction and the total travel of the setpoint position are displayed
in this area. These counters cannot be reset.
Actuator The current values of the counters for movements, changes in
direction and the total distance of the actual position of the drive
are displayed in this area. These counters can be reset.
Armature The current values of the counters for movements, changes in
direction and the total distance of the actual position of the
process valve are displayed in this area. These counters can be
reset.
Reset actuator
(counter)
The counters of the drive are irrevocably reset with this function.
Reset armature
(counter)
This function is used to irrevocably reset the numerators of the
process valve.
Tab. 80: ‘Counter’ menu
7.2.8.3 ‘Partial stroke test’ menu
The Partial Stroke Test (PST) can be used to check the mobility of a safety-related process valve. This
can reduce the probability of failure in an emergency and the required maintenance intervals can be
extended.
With the Partial Stroke Test the process valve is moved from a specified position start value to a
defined position end value. The process valve then returns to its initial position. The characteristics of
the movements (times, pressures) are recorded and compared with the characteristics of a reference
manoeuvre.
If the movements between position start value and position end value are not completed within the
expected times, a message is output. If the movement times are too long and the permissible ranges
for position and pressure are exited, the Partial Stroke Test is terminated prematurely with a message.
The following settings can only be made via EDD and DTM:
– Configure and activate the time-controlled trigger.
–
Adjust the parameters for execution of the movement.
–
Adjust the limit values for the result evaluation and assign them corresponding to the NAMUR
status groups.
– Execute the reference manoeuvre. A valid reference manoeuvre is a prerequisite for executing a PST.