Pfeiffer Vacuum HISCROLL 12, Operating Instructions Manual

Page: 45 / 84

Pressure regulation has priority
When pressure regulation is activated, all other speed modes are inactive.
Standby mode has priority over rotation speed setting mode, auto boost and normal operation.
The automatic speed modes are only possible in combination with the connected pressure sensor. Auto
boost and auto standby can be combined.
[P:020] [P:026] [P:002] Gauge needed [P:006] [P:011]
Common Speed Mode Auto Speed Options
1
Pressure control
n = f [P:730] n = 40% [P:707]
Nominal speed
n = [P:315]
standard
auto boost
auto standby
auto s boost yes
yes
yes
no
0 0
0
1
0
1
0
1
0
Set speed
n = [P:707]
standard
auto boost
auto standby
auto s boost
0
0
1
1
0 1
Standby speed
n = [P:717]
0
0
1
0
1
no
yes
yes
yes
no
yes
Fig. 15: Speed modes
8.5.1 Normal operation
The vacuum pump starts and operates at nominal rotation speed.
Setting the related parameters
1. Set the parameter [P:002] to "0".
2. Set the parameter [P:026] to "0".
3. Check the set rotation speed (parameter [P:308] or [P:397] ).
8.5.2 Standby mode
Pfeiffer Vacuum recommends standby mode for during process and production stops. When standby
mode is active, the electronic drive unit reduces the rotation speed of the vacuum pump. The factory
setting is 50 % of the nominal rotation speed. Stand-by mode has priority over rotation speed setting
mode.
Switching on standby mode
► Press the
button.
Alternative: Operating stand-by using parameters
► Set parameter [P:002] to value of "1".
Alternative: Operating stand-by via "remote" interface
► Bridge pins 7 and 6 for DI standby.
Setting the stand-by rotation speed
The vacuum pump has a variable working range from 40 to 100% of the nominal rotation speed.
1. Set the parameter [P:717] to the required value in %.
2. Set the parameter [P:002] to "1".
3. Check the set rotation speed (parameter [P:308] or [P:397] ).
8.5.3 Speed actuator operation
Rotation speed setting mode reduces the speed and hence the throughput of the vacuum pump. The
pumping speed changes proportionally to the rotation speed. Standby has priority over rotation speed
setting mode. The specification in rotation speed setting mode
[P:707] sets the set rotation speed. The
rotation speed switch point varies with the set rotation speed.
Operation
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