Varian XGS-600 Instruction Manual page 43

Problem
Cannot turn HFIG or IMG on
using the keypad
Cannot turn on Degas
The front panel display indicates
the setpoint triggers/releases at a
slightly different pressure than
what is programmed
Changes to baud rate, comm.
mode, units, keypad lockout, or
ATM value do not take effect
Unit does not respond to RS232
or RS485 commands
Display goes blank followed by
a refill of the screen. Operation
is otherwise normal.
One or more ion gauge
channels (HFIG and IMG)
appear to restart, sometimes a
BDCOMM message appears first
XGS-600 Gauge Controller
Table 4-2 Troubleshooting (Continued)
Cause
❑
Auto-ON programmed for
that gauge
❑
The keypad is locked out
1. Pressure is above 1E-5T
2. Attempted to turn on Degas2
while running Fil1
3. Attempted to degas third
gauge
Time delay = 0.0, 0.1
Did not exit System Setup screen
after making changes
1. XGS600 in wrong serial mode
or incorrect baud rate
2. Incorrect wiring
3. Incorrect terminal settings
Screen refreshes approximately
every 20 minutes
A major EMI disturbance or
other anomaly has caused a
sensor board watchdog timeout
Action
1. This is the correct response
2. If manual control is desired,
turn off AUTO-ON
3. Unlock keypad
1. Pump down before degas
2. Change operation to Fil2
before attempting to degas that
filament
3. XGS-600 will only degas two
gauges at a time
4. Finish a degas before
attempting to start a third
XGS-600 uses a less accurate
pressure measurement for
setpoint delays of <= 0.1 secs to
obtain fastest responsiveness
After making changes, exit the
screen for the changes to take
effect
1. Change serial comm to RS232
or RS485, select proper baud
rate, set RS485 address in
General Setup screen
2. Check wiring
3. Check that terminal has
correct # of data, start/stop bits,
etc.
XGS-600 refreshes the entire
screen periodically to update.
No action required.
This is how the XGS-600
recovers from hard and soft
errors. No action required.
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