FVP 110 Fieldbus Valve Positioner Manual
170
GE Energy
Integration Functions
The transducer block has the parameters containing an integrated operation result
quantity (Table 54).
Each integrated value is associated with a parameter specifying a threshold. Setting the
desired value for a threshold raises a block alarm when that value is reached. The total
travel is useful for various purposes, such as for anticipating possible degradation of the
valve and determining appropriate timing for maintenance. To reset these integrated
values, write 0 to the respective parameters. Use caution as the previous value cannot be
restored after being reset.
Table 54 FVP110’s Parameters Containing Integrated Operation Result Quantity
Item Parameter (upper:
integrated value; lower:
threshold)
Description
Total number of times of
changes in direction of
valve actions
TOTAL_CYCLE_COUNT
CYCLE_COUNT_LIM
Incremented by 1 at each change in the
direction of the valve action. The dead band
can be set in CYCLE_DEADBAND.
Total travel (%) TOTAL_TRAVEL
TRAVEL_LIM
Total travel distance of the stem position,
regardless of the direction of the travel,
represented as a percentage of the valve
position span (full stroke).
The dead band can be set in
CYCLE_DEADBAND.
Total close time (hours) TOTAL_CLOSE_TIME
CLOSE_TIME_LIM
Integrated time periods when the valve position
is equal to or less than the threshold set in
OPEN_CLOSE_THRESHOLD.
Total open time (hours) TOTAL_OPEN_TIME
OPEN_TIME_LIM
Integrated time periods when the valve position
is larger than the threshold set in
OPEN_CLOSE_THRESHOLD.
Total near close time
(hours)
TOTAL_NEAR_CLOSE_TIM
NEAR_CLOSE_TIME _LIM
Integrated time periods when the valve position
is between a shutoff and the threshold set in
NEAR_CLOSE_THRESHOLD.
Useful to predict deterioration of valve body.
Total number of times of
servo output drift warning.
SERVO_WARN_COUNT Indicates the total number of times a drift
warning occurred regarding the output current
to the I/P module.
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