GW Instek AFG-3000 Series - Manual (Page 294)

AFG-3000 Series User Manual
294
Standard Event The Event Status bit is set if an
“enabled” event in the Standard
Event Status Event Register has
occurred.
Master
Summary/
Service
Request bit The Master Summary Status is
used with the *STB? query. When
the *STB? query is read the MSS
bit is not cleared.
The Request Service bit is cleared
when it is polled during a serial
poll.
Output Queue
Description The Output queue stores output messages in a
FIFO buffer until read. If the Output Queue has
data, the MAV bit in the Status Byte Register is set.
Error Queue
Description The error queue is queried using the
SYSTem:ERRor? command. The Error queue will
set the “Error Queue“ bit in the status byte register
if there are any error messages in the error queue.
If the error queue is full the last message will
generate a “Queue overflow” error and additional
errors will not be stored. If the error queue is
empty, “No error” will be returned.
Error messages are stored in the error queue in a
first-in-first-out order. The errors messages are
character strings that can contain up to 255
characters.