EXFO FTB-2 Pro User Manual page 435

IEEE 488.2 and Specific Command Reference
Specific Commands
:SYSTem:ERRor[:NEXT]?
The <Description[,Info]> parameter of the full
response is a quoted string containing a
description followed by information text [,Info].
Each <Code> has a unique and fixed
<Description> associated with it. The <Date>
and <Time> are appended to the [,info]
separated by a semi-colon using the following
format:
<Date><wsp><Time> where
<Date> = Year/Month/Day
<Time> = Hour,Minute,Second (24 hour time)
The maximum length of <Description[,Info]> is
255 characters. For standard defined error/event
<Codes>, the <Description> is sent exactly as
indicated in the appendix of this document.
Example(s) SYST:ERR:NEXT? returns -222,"Data out of range"
SYST:ERR:NEXT? returns -222,"Data out of
range,instrument monomodule 5240S,
2016/07/29 14:56:16.259"
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FTB-1v2 and FTB-1v2 Pro