INSTALLATION
Series 642
46/113
Edition 2017-11-24
605593EC
4.6.9.4
Soft pump control algorithm
Parameter
Command
Request
Data Type
Values
RAMP TIME
Set
s:02D01c
s:02
FLOAT
c = 0.00…1
’
000
’
000.0
Default is: 0.00
Get
i:02D01
i:02D01c
RAMP MODE
Set
s:02D02c
s:02
UINT
c = 0…1
0 = constant time
1 = constant slope
Default is: 0
Get
i:02D02
i:02D02c
P-GAIN
Set
s:02D04c
s:02
FLOAT
c = 0.001…100
Default is: 0.1
Get
i:02D04
i:02D04c
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.
P-GAIN
The P-GAIN is the proportional factor of the soft pump control algorithm.
To optimize soft pump algorithm, refer to chapter «Tuning of control performance».
4.7
Tuning of control performance
Tuning of control performance with adaptive algorithm, refer to chapter: 4.7.1 Tuning of control
performance with adaptive algorithm
Tuning of control performance with fixed PI algorithm, refer to chapter: 4.7.2 Tuning of control
performance with fixed PI algorithm
Tuning of control performance with Soft pump algorithm, refer to chapter: 4.7.4 Tuning of control
performance with soft pump algorithm