Agilent Technologies 969-8888, Instruction Manual

Page: 93 / 116

TECHNICAL INFORMATION
87/107 87-901-011-01
CONTROLLED VENT PROCEDURE
The default setting for vent operating mode is
“Controlled Vent Procedure” (Win 125 = 0).
When activated the procedure guarantees that the
pump is slowed down properly modulating in
automated way the vent valve.
If WIN 125= 1 the vent valve is opened via serial
or Remote I/O, but the “Controlled Vent Proce-
dure” is automatically activated until the speed of
pump is 100 Hz.
CAUTION
The vent could damage the pump. Please, use the
Varian “Controlled Vent Procedure” or refer to Var-
ian personnel.
STOP SPEED READING
This function allows the user to read the pump ro-
tational frequency (window 203) even after a stop
command. The function can be acti-
vated/deactivated by serial line (window 167).
If activated, all the related functions (set point out,
output voltage, …) will follow the frequency read-
ing.
ACTIVE STOP
This function allows the user to brake the pump
without venting. This function must be used care-
fully and with the help of Varian personnel.
The function can be activated by serial line (win-
dow 107).
Win
125
Win
146
1 “OnCommand”
0=”Controlled Vent Procedure”(def)
Pin-10 Low -> Purge Close
Pin-10 High -> Purge Open
Pin-12 Low -> Vent Close
Pin-12 High -> Vent Open
1=Remote-I/O ( def )
0=Serial
win.122=0 Vent Close (def)
win.122=1 Vent Open
win.145=0 Purge Close
win.145=1 Purge Open (def)
Win.126 set the “Vent Valve Opening Delay”, from 0 to
65535, 1bit=0.2s, def=0.2s=1bit
Win.147 set the “Vent Valve Open Time”, from 0 to
65535, 1bit=0.2s, def=0=infinite
Fail -> Vent and Purge =
Closet
Power Fail -> Purge and
Vent = Closed
Command
Status
Speed
Start Stop
Ramp Normal Braking Stop
100 Hz
Purge
Vent
Open
Close
Open
Controlled
Venting
Win 126
Win 147
Close