Measurement Computing Analyzer488 - Manual (Page 171)

Section 4 Serial Controller
4.77
S Addressed state 9 1 T: Talker
L: Listener
I: Idle
Sn Service Request 11 2 S0: SRQ is not asserted.
S1: SRQ is asserted.
Enn Error code 14 3 Enn:
Letter 'E' followed by two-digit error code.
Refer to Appendix B for Error Codes.
Tn Triggered 18 2 T0: No IEEE Trigger command received.
Cn Cleared 21 2 C0: No IEEE Clear command received.
Msg Error description 24 17 Text of error message
m The Operating Mode (C) indicates that the Analyzer488 is the
Active Controller.
nn The Bus Address is the IEEE 488 bus device address assigned
to the Analyzer488 by the ADDRESS command or the front panel
configuration procedure.
Gn The Address Change (G0, G1) indicator is set whenever the
Analyzer488 changes from the idle state to a Talker or Listener, or
from a Talker or Listener state to an idle state. It will not indicate
when a change is made from a listener to a talker or a talker to a
listener. The address change is reset when STATUS 1 is read.
S The Addressed State is the current talker/listener state of the
Analyzer488.
Sn The Service Request indicator reflects the external SRQ status.
If the SRQ line is asserted, S1 will be reported. If it is unasserted, S0
will be reported.