98
Initial start-up and project planning
Type 8650 REV.2
17.5.7
Functions of the actuator parameter
(that is connected to this channel’s pilot valve)
•
switching cycle counter diagnostics approval (read/write)
Defines whether a diagnostics alert will be generated when the warning parameter of the switching cycle
counter is exceeded.
•
switching cycle counter warning parameter (read/write)
Defines the switching cycle counter value at which a diagnostics warning is generated.
•
switching cycle counter reset
Triggers a reset of the respective switching cycle counter.
•
Date of the most recent switching cycle counter reset (read-only)
States when the actuator’s switching cycle counter was most recently reset.
•
current number of switching cycles (read-only)
States how many switching cycles the actuator has performed since the last counter reset.
17.5.8
Functions of the diagnostics parameter
•
compound diagnostics (read/write)
States whether compound diagnostics will be generated.
•
wire break (read/write)
States whether a diagnostics alert is generated when the outlet is open.
•
short circuit (read/write)
States whether a diagnostics alert is generated when there is a short circuit in the outlet.
17.5.9
Why separate switching cycle counters for pilot valve and
actuator?
Each electronic module provides 2 separate switching cycle counters per channel (1x for pilot valve, 1x for
actuator), as the 2 devices (pilot valve on the island, actuator in the field) can also be maintained or replaced
independently of each other.
Example:
Wear parts are being replaced for a process valve in the field for preventive maintenance purposes.
•
The actuator switching cycle counter can be reset,
• while the pilot valve and its current number of switching cycles remain unaffected.
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