Pfeifer Vacuum wrn100, Operating Instructions Manual

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24
The Pfeiffer Vacuum parameter set
Fan
Two options in the connection configuration enable continuous or temperature controlled
operation of a connected air cooling unit
(see p. 17, chap. 6.3)
. Threshold values are
type-specific and are anchored in the electronic drive unit.
Sealing gas valve
 Switch on or off a sealing gas valve which is connected to a pre-configured output via
parameter
[P:050]
.
Vent modes
The turbopump can be vented only after the function "pumping station" has been
switched off. Signals are sent to configured outputs with a fixed delay of 6 s. There are
three options for operation with a venting valve connected.
 Enable venting via parameter
[P:012]
.
 Select the venting mode via parameter
[P:030]
.
Delayed venting
Start and venting time after "pumping station off" are configurable and depend on the ro-
tation speed of the turbopump.
 Parameter
[P:030]
= 0
 Adjust the venting rotation speed in % of the nominal rotation speed via parameter
[P:720]
.
 Adjust the venting time in s via parameter
[P:721]
.
If the venting rotation speed is underrun, the venting valve will open for the set venting
time. In the event of a power failure, venting will occur if the set venting rotation speed is
underrun. In this case, the venting period depends on the residual energy delivered by
the moving rotor. When power is restored, the venting process is interrupted.
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
Monitoring the ther-
mal 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.