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Status and Events
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PS2520G and PS2521G Programmer Manual
Table 9: SBR Bit Functions
Bit
Function
0 (LSB) Not used. This bit is always zero.
1 Not used. This bit is always zero.
2 E/E (Error and Event) indicates an error code is waiting to be
read in the Error Event Queue
3 QUES (QUEStionable) is the summary bit for the QESR
(QUEStionable Event Status Register). When this bit is high it
indicates that status is enabled and present in the QESR.
4 MAV (Message Available) indicates that output is available in
the output queue.
5 ESB (Event Status Bit) is the summary bit for the Standard
Event Status Register (SESR). When this bit is high it indicates
that status is enabled and present in the SESR.
6 RQS (Request Service) is obtained from a serial poll. This bit
shows that the power supply requests service from the GPIB
controller.
MSS (Master Status Summary) is obtained from *STB? query.
This bit indicates another bit in the SBR has been enabled and
is set.
7 (MSB) OPER (OPERation) is the summary bit for the OESR
(OPERation EVENt Status Register). This bit is never set in the
PS2520G and PS2521G Programmable Power Supplies.
Standard Event Status Register (SESR). Figure 11 shows the SESR.
The SESR records five types of events that can occur within the
power supply.
PON USR CME EXE DDE OPC
76543210
QYE
Ċ
Figure 11: The Standard Event Status Register (SESR)