2 – 14
Remote Operation
Instrument Status Register
INSR?
Query the instrument status of the controller. The bits are sticky:
once set, they remain set until queried by this command, at which
point they are cleared. The status bits have the following definitions:
Bit
Meaning
0
Trigger: set when shutter is triggered
1
End of cycle: set after post delay completes
2
End of burst: set after post delay completes and no more
cycles remain
3
OPEN: set when the shutter transitions from closed to open
4
CLOSE: set when the shutter transitions from open to closed.
5
RATE: set when the controller receives a trigger while a
cycle is still in progress
Fault Status
FLTS?
Query the current fault status of the shutter. This command may
return the following fault responses:
Code
Meaning
0
No fault
1
Disconnect fault
2
Fault reported by shutter
3
12 V power fault
If the shutter reported a fault, use the
SERR
command to identify
the cause.
FLTS?
CR
Example:
1
A return of 1 indicates that the shutter head is disconnected.
Last Error
LERR?
Query the last error in the error bu
ff
er. Errors are returned on a
first-in-first-out basis.
Upon executing a LERR? query, the returned error is removed from
the error bu
ff
er. See the section Error Codes later in this chapter for a
description of the possible error codes returned by
LERR?
. The error
bu
ff
er has space to store up to 20 errors. If more than 19 errors occur
without being queried, the 20
th
error will be 254 (Too Many Errors),
indicating that errors were dropped.
SR470 Shutter Controller
