6000 Vortex Series Computer Control • 37
Query Standard Event Status Register
Syntax *ESR?
Vortex Actions Returns the value of the Event Status Register and
then clears the register (returns all bits to 0).
Response An integer in the range 0 to 255, corresponding to
the combined weight of the bits that are set.
Example Determine if the system has been restarted since the
last time this query was made:
*ESR?
⇒ 160
(160=128+32, the system has been restarted and
there was a command parse error)
Standard Event Status Register
Bit # Weight Description
7 128 Power on or restart
6 64 not used
5 32 IEEE: a command parse error.
RS-232: not used.
4 16 IEEE: system not available for com-
mand or invalid data (out of
range). For example, attempting
to change modes while the laser
diode power is on.
RS-232: not used.
3 8 not used
2 4 Query error: no data in queue.
1 2 not used
0 1 not used
Vortex6000.book Page 37 Tuesday, February 19, 2002 3:25 PM
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