Metrolab FDI 2056, User Manual, Page: 15 / 87

FDI2056 Use
r’s Manual
v 2.0 r 1.1
– 03/13
Copyright © 2013 Metrolab Technology SA
10 www.metrolab.com
3-3 IEEE 488.2 / SCPI STATUS REGISTERS
IEEE 488.2 compliant instruments have at least two registers: the Status Byte and
the Standard Event Status Register. SCPI adds the Operation Status Register,
Questionable Status Register and Error/Event Queue. The diagram below, taken from
the SCPI standard, provides a good summary. This section describes how the
FDI 2056 uses these status registers.
Status Byte 3-3-1

Contains a 1-byte status summary. The FDI 2056 uses the following bits:
Bit Name Description
2 EAV Error AVailable (in Error/Event Queue)
3 QSB Questionable Summary Bit
4 MAV Message AVailable: response ready to be read
5 ESB Event Summary Bit
6 RQS ReQuest for Service