Rotex Posidapt Expert, Installation, Operation And Maintenance Manual

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RTX-IOM-PRODUCT-YY Page 92 of 131
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Deviation of Set point
Applicable for Posidapt
– Ultra
This parameter is used for dynamic monitoring of the control valve response. The actual
position course is compared with the expected position course for this purpose. This
comparison helps in drawing a conclusion about the correct operational response of the
control valve.
Monitoring Time for Regulating Set point
This parameter is used to define the attenuation effect.
The current value is displayed in the "Control valve deviation" in Values and Counters under
Counter Thresholds and Trends. The device triggers a fault message if the current value
exceeds one of the three configurable limit thresholds.
•
Auto - Factory default
This sub-parameter is set to "Auto" if the device is auto calibrated. The time constant is
determined from the calibration process by actuating times open & close or value defined in
the velocity parameter.
•
Custom
If the time constant is inadequate, it can be change manually using this parameter. The unit
is in seconds. The value can be set from 1 to 400 seconds
Threshold Limit 1
This parameter defines the magnitude of the permissible deviation from the expected position.
•
Off
This parameter value does not trigger any message or alarm.
•
Custom
The threshold 1 fault message is displayed when the limit threshold 1 is exceeded. The value
can be set from 0.1 to 100.0%
Threshold Limit 2
This parameter defines the magnitude of the permissible deviation from the expected position.
•
Off
This parameter value does not trigger any message or alarm.
•
Custom