Edwards STP-iXA4507 Series User Manual

STP-iXA4507 series Turbomolecular Pump
MT-91E-001-0
Page 58
OPERATION
PAG
E
58
4
4.8 Second speed option
When the second speed option is enabled, the second rating speed can be set independently of the
normal rating speed setting. Either the second or normal rating speed can be selected by I/O remote
input or serial communication port.
The second speed setting can be changed from serial communication port, or STP-Link. (see Section
5.4, "Command specifications")
Table 15 shows the STP pump actions when switching the speeds.
Pump status
The difference
between the Normal
Speed and the
Second Speed
Setting is more than
approximately 10%
When the rotational speed becomes lower, the STP pump enters
the BRAKE mode and decelerates.
When the rotational speed becomes higher, the STP pump enters
the ACCEL mode and accelerates.
The STP pump will enter the normal mode when the rotational
speed is within +10% of the speed setting.
NORMAL
BRAKE
ACCEL
NORMAL
NORMAL
Pump status
Speed Set Point
Second Speed Set Point
Second Speed Set Point -10%
Second Speed Set Point +10%
Speed Set Point +10%
Speed Set Point -10%
Second speed select
OFF
ON
OFF
Rotational speed
The difference
between the Normal
Speed and the
Second Speed
Setting is
approximately 10%
or less
The rotational speed changes remaining in the normal mode.
NORMAL
Pump status
Speed Set Point
Second Speed Set Point
Second Speed Set Point -10%
Second Speed Set Point +10%
Speed Set Point +10%
Speed Set Point -10%
Second speed select
OFF
ON
OFF
Rotational speed
Table 15 - Second speed function

Edwards STP-iXA4507 Series Specifications

General

Brand	Edwards
Model	STP-iXA4507 Series
Category	Water Pump
Language	English