32
The Pfeiffer Vacuum parameter set
No venting
No venting is performed during this operation mode.
Parameter
[P:030]
= 1
Direct venting
Start and venting time are not configurable. Venting starts with a delay of 6 s after "pump-
ing station off". When the function "pumping station" is switched on renewed, the venting
valve closes automatically. In the event of a power failure, venting will occur if an an-
chored type-specific rotation speed is underrun. When power is restored, the venting
process is interrupted.
Parameter
[P:030]
= 2
9.4.13 Monitoring the thermal load
If threshold values are overrun, output signals from temperature sensors allow the pump
to be brought to a safe condition. Depending on pump type, temperature threshold val-
ues for warnings and error messages are saved fixed in the electronic drive unit . For
information purposes, various status queries are prepared in the parameter set.
9.5
Switching on/off the pump
9.5.1
Switching on
The function "pumping station" comprises turbopump operation with control of all con-
nected accessories (e.g. backing pump).
Parameter
[P:023]
= 1
Parameter
[P:010]
= 1
Ongoing (and removed) error messages are reset. After a successfully completed self-
test, the electronic drive unit sets the turbopump motor and all connected accessories
into operation depending on their configuration.
When the pumping station is activated, the motor of the turbopump can be switched off
and on via the function
[P:023]
.
9.5.2
Switching off
Parameter
[P:010]
= 0
The electronic drive unit switches off the turbopump and activates preset accessory op-
tions (e.g. venting ON, backing pump OFF).
