AMETEK XG Family Programmable DC - Manual (Page 164)

Remote Operation
5-32 M370430-01 Rev E
Status Byte
The Status byte register contains the STB and RQS (MSS) messages as
defined in 488.1. You can read the status byte register using a 488.1
serial poll or the 488.2 *STB? common command.
The *STB? query causes the device to send the contents of the Status
Byte Register and the Master Summary Status (MSS) summary
message. The *STB? query does not alter the status byte, MSS, or RQS.
Table 5-10 Status Byte Summary Register
Bit
Bit
Weight Bit Name
Description
0 1 Reserved Reserved
1 2 Reserved Reserved
2 4 Error/Event Queue (ERR) Set if any errors are present in the Error/Event queue.
3 8 Questionable Status
Register (QSR) Set if any bits are set in the Questionable Status Event
register.
4 16 Message Available
(MAV) Indicates whether the output queue is empty. MAV is
TRUE if the device is ready to accept a request from the
controller.
5 32 Standard Event Status Bit
Summary (ESB) A summary of the Standard Event Status Register.
6 64 Request Service (RQS) /
Master Status Summary
(MSS)
Not Implemented / MSS indicates that the device has at
least one reason for requesting service.
7 128 Operation Status Register
(OSR) Present if a bit is set in the Operation status register.
Error/Event Queue (ERR)
This bit is TRUE if any errors are present in the Error/Event Queue.
Questionable Status Register Summary (QSR)
This bit is TRUE when a bit in the Questionable Event Status Register is
set and its corresponding bit in the Questionable Status Enable Register
is TRUE.