VXI 3002 - Manual (Page 68)

STATUS BYTE
3-38
Status byte when read by serial poll
*SRE
*SRE?
C0074
e
d
d
e
d
d
e
d
d
e
d
d
e
d
d
e
d
d
e
d
d
e
d
d
3
3
3
7
7
7
5
5
5
1
1
1
2
2
2
6
6
6
4
4
4
0
0
0
-
Status Byte Register
Service Request Enable Register#
Register
Read/Write
Commands
Service
Request
Generation
# Bit 6 in this register ignores data sent by *SRE and always returns 0 in response to
*SRE?
is a device defined queue summary bit indicating that the error queue is
non-empty.
is set by a request for service and is cleared by the poll.
is the standard event register summary bit.
is 'message available' indicating that the output queue is non-empty.
is 'hardware status' summary bit
is 'coupling status' summary bit
is 'instrument status' summary bit
, and are defined in IEEE 488.2
(request for service) will produce an SRQ at the controller. It is set by a change to
either the Status Byte or the Service Enable Register that results in a New Reason for
Service. It is cleared when goes FALSE (i.e. no reason for service) or by Serial
Poll.