Pump Shutdown; Power Failure; Remote Control Mode Operation; Rs232/422/485 Control Mode Operation - Varian Turbo-V 150HT Bedienungshandbuch

and when the pump reaches the low speed value, display
reverts to:
N O R M A L
4 1
With normal LOW SPEED operation, the pump will run at
about 2/3 of its nominal speed and achieves a base
pressure somewhat higher
specifications. If the gas load becomes higher, the
controller output frequency and voltage start to decrease
automatically, and the Turbo-V pump is slowed down in
proportion to the gas load until it reaches about 3 KRPM.
If the LOW SPEED mode is selected after normal
operating condition is reached, the display shows:
A P P R O A C H
X X
while approaching the low speed value.
When the low speed mode is deselected, the pump starts
to accelerate to its rotational speed. During the
acceleration the display shows:
N O R M A L
X X

Pump Shutdown

Press the front panel STOP push-button or remove the
remote signal; the power from the turbopump will be
removed and the pump will begin to slow down.

Power Failure

In the event of a power failure (momentary or long term),
the Turbo-V controller will stop the turbopump and all the
interconnected pumps/devices. The Turbo-V vent valve
device, if used, will vent the turbopump only if the power
failure is longer than the preset delay time. When power is
restored, the Turbo-V controller automatically restarts the
interconnected devices and the turbopump in the proper
sequence. The display shows:
P U M P I S
1 2 X X
until normal operation achieved.
O P E R A T I O N
K R P M L S
than the standard
I N G L S
K R P M L S
O P E R A T I O N
K R P M
S T A R T I N G
K R P M

Remote Control Mode Operation

If remote signals are used to operate the controller, it must
be programmed for remote operation (see paragraph "
Operating parameter selections " ) and when ready to
start, the display shows:
R E A D Y
S O F T S T A R T
If the Soft Start has been deselected the display shows:
P U M P R E A D Y
R E M O T E
With or without Soft Start mode selected the START/STOP
and LOW SPEED front panel push- buttons are
inoperative, while the CYCLE NUMBER and PUMP
CURRENT pushbuttons are always active.
RS 232/422/485 Control Mode Operation
If one of serial interface options is installed and the
controller has been programmed for serial operation, the
controller may be driven by a computer and when ready to
operate, the display shows:
P U M P R E A D Y
R S X X X
If the Soft Start has been deselected the display shows:
R E A D Y
S O F T S T A R T
The value which corresponds to the board installed will be
assigned to RSXXX
With or without
START/STOP, LOW
computer control, while the CYCLE NUMBER and PUMP
CURRENT front panel pushbuttons are always active.
73
TECHNICAL INFORMATION
F O R R E M O T E
: U S E
S T A R T
: U S E
L I N E
F O R R S X X X
Soft Start mode selected
SPEED functions are
87-900-893-01 (C)
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