VAT 653 AQ Series, Инструкции по установке, эксплуатации и обслуживанию

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Series 65 INSTALLATION
982156EB Edition 2019-06-05 41/110
4.6.2 Sensor crossover (2 sensor operation mode)
When two sensors are used for pressure control the crossover handles the two pressure signals to
building one system pressure (Actual Pressure).
Parameter Description
Crossover Mode Crossover between 2 sensors (see below)
Threshold High [SFS low sensor]
Threshold Low [SFS low sensor]
Defines the crossover area (see below)
Delay
Switch over delay in Crossover Mode ‘Hard Switch’
Crossover Mode Soft Switch
Within the threshold levels, the resulting measurement
value is a summation of the two sensors signals with a
proportional ratio of the two measured values.
When to use
This is the standard mode. Values of both sensors need
to fit together in the crossover area, otherwise crossover
effect result (nonlinearity). Therefore, sensor ratio should
not be too high (about <= 100).
Crossover Mode Hard Switch
Switching between sensors according to the hysteresis
threshold levels and an optional delay.
When to use
Preferred setting if the sensor signals don’t fit together in
the crossover area (for example if sensor ratio is high).
Crossover Mode Target Pressure
If target pressure is in the range of low sensor, low
sensor is used; otherwise high range sensor.
When to use
As there is no switchover during pressure control while
using this setting, undesired effects like nonlinearity or
continuous switching between sensors don’t occur.
Note
While in position control mode, ‘Soft Switch’ mode is
used
Parameter location:
CPA DEVICENET
Pressure Sensor.Crossover Only Crossover Mode in S-Analog Sensor Object
(Class ID 49)
via Sensor Mode