
B-70264EN/02 5.ALARMS
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ALM No.4088
LASER VOLTAGE DOWN
This alarm is issued, if the voltage applied to the discharge tube
drops largely.
Alarm output condition
1) Immediately before the oscillation ready state (LSTR) is established,
the RF voltage of the power supply with the smallest number in the
selected discharge tubes is compared with the discharge tube
voltage in normal condition (parameter No. 15270). This alarm is
issued if the voltage has dropped by at least the allowable discharge
tube voltage drop. If the drop is less than the allowable drop, the RF
value at this time is stored in parameter No. 15270 as the discharge
tube voltage in normal condition.
2) During power compensation or in LSTR in which external power
control is not in progress, the RF voltage is compared with the
discharge tube voltage in normal condition (parameter No.15270). If
the voltage has dropped by at least the allowable discharge tube
voltage drop, another comparison is made in one second. This
alarm is issued if the state remains unchanged.
Related parameters
PRM.15270 Discharge tube voltage in normal condition
PRM.15272 Allowable discharge tube voltage drop
Related data
DGN.909-924 Discharge tube voltage and current
ALM No.4089
ASSIST GAS NO SELECT
This alarm is issued when no assist gas is output during beam
output.
Alarm output condition
This alarm is issued, if an attempt is made to radiate a laser beam, when
no assist gas is selected, or an assist gas condition is not set up.
Related data
F222#0 to #2 Assist gas selection signal
ALM No.4090
LASER NOT GENERATE
This alarm is issued if an attempt is made to radiate a laser beam
when the laser is not in the oscillation ready (LSTR) state.
Alarm output condition
This alarm is issued if the oscillation ready (LSTR) state is not
established during beam output.
Related data
F221#6 Oscillation in-progress signal