2.5 Command List
2 – 15
Trigger Status
TRGS?
Query the triggered status of the controller. The bits have the follow-
ing meanings:
Bits 0-1:
Code
Meaning
0
Idle
1
PreDelay
2
Exposure
3
PostDelay
Bits 2-3:
Code
Meaning
0
Open
1
Closed
2
Indeterminate
3
Indeterminate
2.5.3
Instrument Control Commands
Abort Trigger in Progress
ABRT
Abort any trigger in progress and return the shutter to the unasserted
state. Any trigger received subsequent to this command will trigger
a new cycle.
Assertion State
ASRT(?)
{
i
}
Set (query) the assertion state of the shutter
{
to
i
}
.
The set version forces the shutter to the given state by canceling
any trigger in progress and changing the trigger source to internal
trigger mode. If the parameter
i
is 0 the shutter is unasserted (i.e.,
commanded to the
normal
state). If it is 1, the shutter is asserted.
ASRT 0
CR
Example:
Place the shutter in the unasserted state.
ASRT?
CR
Example:
1
A return of 1 indicates that the shutter is asserted, i.e., commanded
to the
normal
state.
SR470 Shutter Controller
