Functional safety for SIPART PS2 FF
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A5E00489774-02, 10/2013
1 STRKS - number of strokes
Communication object: [TOTAL_VALVE_TRAVEL]
The movements of the actuator in operation are summed up and can be read here as the stroke number. Unit: 100%
strokes, i.e. the path between 0 and 100% and back. The value is written in a non-volatile memory every 15 minutes. It can
be set to zero using the increment button.
2 CHDIR - number of changes in direction
Communication object: [NUMBER_DIRECTION_CHANGE]
Every change of direction of the actuator caused in the deadband is noted in the closed-loop controller and added to the
number of changes of direction.
The value is written in a non-volatile memory every 15 minutes. It can be set to zero using the increment button.
3 CNT - number of fault messages
Communication object: [NUMBER_ALARMS]
Every fault is noted in the closed-loop controller and added to the number of fault messages. The counter can be set to zero
using the increment button.
4 A1CNT - number of alarms 1
Communication object: [NUMBER_ALARMS_1]
5 A2CNT - number of alarms 2
Communication object: [NUMBER_ALARMS_2]
The response of alarms 1 and 2 is counted using these two counters. Activation of alarms using the "AFCT" parameter is a
requirement for this, see below. The counters can be set to zero using the increment button.
6 HOURS - operating hours
Communication object: [RB.HOURS]
The runtime meter is incremented every hour as soon as electric auxiliary power is supplied to the positioner.
7 WAY - determined travel
Communication object: [RATED_TRAVEL]
This value indicates the actuator travel determined during the initialization process as per the display at the end of an
initialization process. Requirement for lift actuators: Specification of the lever arm using the "YWAY" parameter. See below.
8 TUP - actuating time UP
Communication object: [ACT_STROKE_TIME_UP]
9 TDOWN - actuating time DOWN
Communication object: [ACT_STROKE_TIME_DOWN]
These values indicate the actuating times determined during the initialization process. The unit is seconds.
10 LEAK - leakage
Communication object: [LEAKAGE]
If a leakage measurement was initiated during the initialization process, the leakage value in %/min can be read here.
