26
The Pfeiffer Vacuum parameter set
7.4.6
Adjusting the rotation speed switchpoint
The rotation speed switchpoint can be used for the message "Pump operational for the
process". Overrunning or underrunning the active rotation speed switchpoint activates or
deactivates a signal at the pre-configured output on the electronic drive unit and at the
status parameter
[P:302]
.
Rotation speed switchpoint 1
Adjust the parameter
[P:701]
to the desired value in %.
Parameter
[P:017]
= 0
Signal output and status parameter
[P:302]
are based on the set value for rotation speed
switchpoint 1
[P:701]
.
Fig. 5:
Example for the configuration rotation speed switchpoint 1 active
Rotation speed switchpoint 1 & 2
Adjust the parameter
[P:701]
to the desired value in %.
Adjust the parameter
[P:719]
to the desired value in %.
Parameter
[P:017]
= 1
When the pumping station
[P:010]
is switched on, the rotation speed switchpoint 1 is the
signal generator. When the pumping station is switched off, signal output and status que-
ry are based on the rotation speed switchpoint 2. The signal output is governed by the
hysteresis between the two switchpoints.
Fig. 6:
Example for the configuration rotation speed switchpoint 1+2 active; [P:701] > [P:719]
Process
f
(%)
t
t
t
[P:010]
[P:302]
[P:701]
[P:017] = 0
0
1
0
1
Process
f
(%)
t
t
t
[P:010]
[P:302]
[P:701]
[P:719]
[P:017] = 1
0
1
0
1
