Spirax Sarco SP8-10, Installation And Maintenance Instructions Manual

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IM-P707-01 CTLS Issue 1
74
SP8-10 Smart positioner
5.1.35 Menu: Diagnosis
Menu/parameter Value range Description
Partial Stroke
PS Configuration, PS
Interval, PS Start Now
'Partial Stroke Test' is used to test the mobility of the
safety-related valves and fittings. For this purpose,
the valve is moved by a configurable amount in the
direction of the safety position (venting of positioner
output 1).
If this does not happen within the expected time, an
alarm is signaled. After the test, the valve follows the
current set point again.
The start of the test is triggered using a time interval
‘PS Interval’, through the digital input (configuration:
Input/Output-> Digital Input-> DI Function -> Partial
Stroke) or locally on the device ‘PS Start Now’.
Histogram
Pos. Timeout
Valve Movements
Valve Cycles
Mainly Used Pos.
Universal input
Use this parameter to select which histogram is to be
displayed.
In this menu, the number of values or events is
assigned to a valve range and displayed as an
individual bar graph. The valve ranges are divided up
as follows:
< 0 %, 0 - 10 %, 10 - 20 %, 20 - 30 %, 30 - 40 %, 40
- 50 %, 50 - 60%, 60 - 70 %, 70 - 80 %, 80 - 90%, 90 -
100 %, > 100 %
The histograms support valve diagnostics and allow
conclusions to be drawn about the valve, control
quality, wear, and properties of the valves and fittings.
-
Pos. Timeout - Number of ‘positioning time too
slow’ events
-
Valve Movements - Number of valve movements
-
Valve Cycles - Number of valve lifts
-
Mainly Used Pos. - Most used valve position
-
Universal input - Universal input value
Travel Counter 0 to 200,000,000
The ‘Travel Counter’ is used to determine the
positioner travel. The counter adds up the distance
traveled as a % of the set ‘operating range’.
Limit values can be configured for the counter (only
via DTM/EDD). If the ‘Travel Counter’ reaches a limit
value, a message is output.