The Pfeiffer Vacuum parameter set
29
Fig. 11: Example for the configuration rotation speed switchpoint 1+2 active; [P:701] > [P:719]
Fig. 12: Example for the configuration rotation speed switchpoints 1+2 active; [P:701] < [P:719]
9.4.7
Rotation speed setting mode
The rotation speed setting mode reduces the rotation speed and hence the throughput
of the turbopump. The pumping speed of the turbopump changes proportional to rotation
speed. Standby mode is ineffective during rotation speed setting mode. The set rotation
speed is adjusted by the set value in rotation speed setting mode
[P:707]
. The rotation
speed switchpoint varies with the set rotation speed. Underrunning or overrunning the
set value in rotation speed setting mode activates and deactivates the status signal
[P:306] SetSpdAtt
respectively.
Adjust the parameter
[P:707]
to the desired value in %.
Parameter
[P:026]
= 1
Read the parameters
[P:308]/[P:397]
.
Process
f
(%)
t
t
t
[P:010]
[P:302]
[P:701]
[P:719]
[P:017] = 1
0
1
0
1
Process
f
(%)
t
t
t
[P:010]
[P:302]
[P:719]
[P:701]
[P:017] = 1
0
1
0
1
Permissible rotation speed range of the turbopump
Adjustments in the rotation speed setting mode or in the standby mode are subject to
the permissible rotation speed range of the respective turbopump. Underrunning the
minimum permissible value causes the warning message
Wrn100
. The electronic drive
unit resets the set rotation speed automatically to the next valid value.
Maintain the permissible rotation speed range of the turbopump (please refer to the
technical data in the operating instructions for the respective turbopump).
