maintenance/
troubleshooting
4
9
Synrad
Firestar ti-Series
operator’s manual
Troubleshooting
Status LEDs
Firestar ti-Series LED indicators, also mirrored as output signals on the
User I/O
connector, provide status
information to the user. Table 4-2 shows Firestar output signal and LED indicator states during normal and
fault conditions.
User I/O
outputs are Closed when the state indicated by the signal name is True.
Table 4-2
Status signals
LED Indicator
LED Status
Signal Name
User I/O Output Status
Normal
Fault
Normal
Fault
INT
Green
Red
Interlock Open
Open
Closed
TMP
Green
Red
Over Temperature
Open
Closed
RDY
Yellow
Off
Laser Ready
Closed
Open
SHT
Blue
Off
Shutter Open
Closed
Open
LASE
Red
Off
Laser Active
Closed
Open
On ti-Series keyswitch lasers, the
RDY
indicator illuminates yellow only when
INT
and
TMP
indicators
are green and the
Keyswitch
is cycled from OFF to the ON position. After the
RDY
indicator illuminates,
a five-second delay occurs before Firestar is permitted to lase. The
SHT
LED illuminates blue when a
Shutter Open Request
signal is applied and the manual
Shutter Switch
is set to Open. If the
RDY
indicator
is lit and the shutter is switched from Closed to Open, there is a five-second delay until PWM inputs are
recognized. When PWM Command pulses are applied (and are long enough to produce laser output) the
LASE
LED illuminates red.
On OEM lasers, the
RDY
lamp illuminates on DC power-up when
INT
and
TMP
indicators illuminate
green. After the
RDY
indicator illuminates, a five-second delay occurs before Firestar is permitted to lase.
The
SHT
LED illuminates blue when a
Shutter Open Request
signal is applied. If the
RDY
indicator is
lit and then a
Shutter Open Request
signal is applied, there is a five-second delay until PWM inputs are
recognized. When PWM Command pulses are applied (and are long enough to produce laser output) the
LASE
LED illuminates red.
Note:
Firestar
RDY
and
SHT
indicators (as well as
Laser Ready
and
Shutter Open
outputs) denote
separate control functions. Although the
RDY
lamp may light while the
SHT
LED is Off (
Shutter
Switch
Closed or
Shutter Open Request
signal missing), no power is applied to the RF boards
until both
RDY
and
SHT
indicators are illuminated.
Tables 4-3 through 4-5 on the following page show how Firestar’s signal status changes when remote inter-
lock, over temperature, or shutter closed conditions occur.
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