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Status Registers
Overview
78 Operating Manual for Multichannel Functionality (GPIB-M)
Table 4.10 Standard Event Status Register
Bit Bit Weight Bit Name Description
0 1 Operation
Complete
(OPC)
Set if *OPC command has been received
and all pending operations have been
completed. The message, Event –800
Operation Complete, is loaded into the
Error/Event Queue.
1 2 Request Control
(RQC)
Not implemented. Always set to 0.
2 4 Query Error
(QYE)
Set if an attempt is being made to read
data from the output queue when no
output is either present or pending.
Suggests that data in the output queue has
been lost. See
“Query Error List” on
page 121
for possible error codes.
3 8 Device Dependent
Error
(DDE)
Set if there is a device-specific error. See
“Device-Specific Error List” on page
120 for possible error codes.
4 16 Execution Error
(EXE)
Set if a program data element, following a
header, was evaluated by the power
supply as outside of its legal input range,
or is otherwise inconsistent with the power
supply’s capabilities. Suggests that a valid
program message could not be properly
executed due to some power supply
condition. See
“Execution Error List” on
page 118 for possible error codes.
5 32 Command Error
(CME)
Set if an IEEE488.2 syntax error has been
detected by the parser, an unrecognized
header was received, or a group Execute
Trigger was entered into the input buffer
inside an IEEE 488.2 program message.
See
“Command Error List” on page 118
for possible error codes.
6 64 User Request
(URQ)
Set if the bit is unmasked and the
instrument wishes to support a 488.2 user
request event. An event occurs when the
instrument detects the activation of a user
request local control. The message, Event
–600 User Request, is loaded into the
Error/Event Queue.
7 128 Power ON
(PON)
Not implemented
8–15 Reserved Reserved for possible future use by IEEE.
Bit values are reported as zero.