VAT 642 Series - Page 77

Series 642 INSTALLATION
742280ED Edition 2017-11-24 77/
119
4.8.5.2 Fixed 1 control algorithm
Parameter Command Request Data Type Values
RAMP TIME
Set
s:02B01c
s:02
FLOAT
c = 0.00…1 ’ 000 ’ 000.0
Default is: 0.00
Get i:02B01
i:02B01c
RAMP MODE
Set
s:02B02c
s:02
UINT
c = 0 or 1
0 = constant time
1 = constant slope
Default is: 0
Get i:02B02
i:02B02c
CONTROL
DIRECTION
Set
s:02B03c
s:02
UINT
c = 0 or 1
0 = downstream
1 = upstream
Default is: 0
Get i:02B03
i:02B03c
P-GAIN
Set
s:02B04c
s:02
FLOAT
c = 0.001…100
Default is: 0.1
Get i:02B04
i:02B04c
I-GAIN
Set
s:02B05c
s:02
FLOAT
c = 0…100.0
Default is: 0.1
Get i:02B05
i:02B05c
Explanation:
RAMP TIME
Pressure setpoint ramp time [s]
RAMP MODE
Mode = 0
Constant Time
The RAMP TIME is dependent on the adjusted parameter ramp time and is
always the same independent of the control deviation. That means the ramp
time from the actual value to the setpoint value is the adjusted parameter ramp
time value.
Mode = 1
Constant Slope
The RAMP TIME is dependent on the adjusted parameter ramp time and is
different depending on the control deviation. The RAMP TIME is calculated
corresponding to the sensor full scale value (10V). Ramp time = 10 sec.; ramp
time slope is SFS (10V) in 10 Seconds.
CONTROL DIRECTION
The CONTROL DIRECTION defines the type of application, if the valve is mounted in downstream or
upstream. Downstream means the valve is after the chamber and before the pump. Upstream, valve is
mounted before chamber and pump.
P-GAIN / I-GAIN
The P-GAIN is the proportional factor of the fixed control algorithm. The I-GAIN is the integral factor.