22
The Pfeiffer Vacuum parameter set
Rotation speed set-
ting 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]
.
Standby
Pfeiffer Vacuum recommends standby mode for the turbopump during process and pro-
duction stops. When standby mode is active, the electronic drive unit reduces the rotation
speed of the turbopump. Standby mode is ineffective during rotation speed setting mode.
The factory setting for the set value in standby mode is 66.7 % of the nominal rotation
speed. Underrunning or overrunning the set speed in standby mode activates or deacti-
vates the status signal
[P:306] SetSpdAtt
.
Adjust the parameter
[P:717]
to the desired value in %.
Parameter
[P:026]
= 0
Parameter
[P:002]
= 1
Read the parameters
[P:308]/[P:397]
.
Rotation speed set
value
The typical nominal rotation speed of a turbopump is factory-set in the electronic drive
unit. If the electronic drive unit is replaced or a different pump type is used, the reference
set value of the nominal rotation speed must be confirmed. This procedure is part of a
redundant safety system for avoiding excess rotation speeds.
Adjust the parameter
[P:777]
according to the pump type.
Once the nominal rotation speed is attained, the pump will run idle unless additional gas
loads are entered. Depending on process or application requirements, the nominal rota-
tion speed can be reduced in rotation speed setting mode or standby mode.
Operation mode
backing pump
Operation of a connected backing pump via the electronic drive unit depends on the
backing pump type.
Adjust the parameter
[P:025]
to the desired value.
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).
HiPace
Nominal rotation speed confirmation [P:777]
10 / 60 / 80
1500 Hz
300
1000 Hz
Operating mode [P:025]
Recommended backing pump
"0" Continuous operation
All backing pumps
"1" Intermittent operation
Diaphragm pumps only
"2" Delayed switching on
All backing pumps
"3" Delayed intermittent operation
Diaphragm pumps only
