2 – 26
Remote Operation
2.6.2
Query Errors
Error Code
Meaning
30
Lost Data
Data in the output bu
ff
er was lost. This occurs
if the output bu
ff
er overflows, or if a communi-
cations error occurs and data in output bu
ff
er is
discarded.
32
No Listener
This is a communications error that occurs if the
SR470 is addressed to talk on the GPIB bus, but
there are no listeners. The SR470 discards any
pending output.
2.6.3
Device Dependent Errors
Error Code
Meaning
40
Failed ROM Check
The ROM checksum failed. The firmware code is
likely corrupted.
2.6.4
Parsing Errors
Error Code
Meaning
110
Illegal Command
The command syntax used was illegal. A com-
mand is normally a sequence of four letters, or a
‘*’ followed by three letters.
111
Undefined Command
The specified command does not exist.
112
Illegal Query
The specified command does not permit queries
113
Illegal Set
The specified command can only be queried.
(Continues)
SR470 Shutter Controller
