VAT 653 Series - Page 45

Series 65 INSTALLATION
963283EA Edition 2019-05-03 45/
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“Sensor Crossover” defines the behavior when the actual pressure is around the upper limit of the low
range sensor and define what sensor signal is used for building the Actual Pressure.
Parameter Description
Crossover Mode
Execution method of the transient area from one sensor to the other:
0: Soft Switch Actual Pressure is a summation of the
pressure value of sensor 1 and sensor 2.
1: Hard Switch Actual Pressure is the value of sensor 1 or
sensor 2
2: Target
Pressure
During pressure control: If Target Pressure
falls into low range sensor, the low sensor is
used for Actual Pressure. In other case the
high range sensor is used.
During position control: ‘Soft Switch’ is used.
Threshold High [SFS low
sensor]
Threshold Low [SFS low
sensor]
Defines the crossover area in Crossover Mode ‘Soft Switch’ and
‘Hard Switch’.
Example: Threshold High = 1.0 [SFS of low sensor]
Threshold Low = 0.9 [SFS of low sensor]
Soft switch:
At pressure <= 0.9*SFS low sensor:
Actual Pressure = Sensor low pressure
At pressure 0.95*SFS low sensor:
Actual Pressure = 50% * Sensor low pressure + 50% sensor
high pressure
At pressure >= 1.0*SFS low sensor:
Actual Pressure = Sensor high pressure
Hard switch:
At pressure increase over 1.0*SFS low sensor:
Actual Pressure = Sensor high pressure after
Delay
At pressure decrease under 0.9*SFS low sensor:
Actual Pressure = Sensor low pressure after
Delay
Delay
Switch over delay in Crossover Mode ‘Hard Switch’, see example
above.