Pfeiffer, TC 400, Electronic Drive Unit, Operating_Instructions

The Pfeiffer Vacuum parameter set
Parameter [P:017] = 1
When the pumping station [P:010] is switched on, the rotation speed switch point 1
is the signal generator. When the pumping station is switched off, signal output
and status query are based on the rotation speed switch point 2. The signal output
is governed by the hysteresis between the two switch points.
f (%)
[P:017] = 1
[P:701]
[P:719]
t
[P:010]
1
0
t
[P:302]
1
0
t
Process
Fig. 6: Example for the configuration rotation speed switch point 1+2 active; [P:701] > [P:719]
f (%)
[P:017] = 1
[P:719]
[P:701]
t
1
[P:010]
0
t
1
[P:302]
t
0
Process
Fig. 7: Example for the configuration rotation speed switch points 1+2 active; [P:701] < [P:719]
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 switch point 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 production stops. When standby mode is active, the electronic drive unit reduces
the rotation speed of the turbopump. 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 deactivates the status signal
[P:306] SetSpdAtt.
Adjust the parameter [P:717] to the desired value in %.
Parameter [P:002] = 1
Read the parameters [P:308]/[P:397].
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