Appendix C: Status model
Series 2200 Programmable DC Power Supplies Reference Manual
C-6
2200S-901-01 Rev. C / March 2016
SESR bit functions
Bit
Function
7 (MSB)
————
This bit is not used.
6
————
This bit is not used.
5
————
This bit is not used.
4
PS
Protection Shutdown.
3
RI
Remote Inhibit. This bit indicates the state of the Remote Inhibit input.
2
UNR
Unregulated. Indicates that the power supply has gone out of regulation.
1
OT
Over Temperature. Indicates that the power supply has experienced an over
temperature condition and the output has been shut down.
0 (LSB)
OV
Over Voltage. Indicates that the overvoltage protection threshold has been
exceeded and the output has shut down.
Questionable positive transition register (QPTR)
The
Questionable event register (QEVR)
(on page C-6) can be configured to respond to specific
transitions in the
Questionable condition register (QCR)
(on page C-5). The transitions and the
polarity of these transitions are specified in the qestionable positive transition register (QPTR) and
Questionable negative transition register (QNTR)
(on page C-6). These registers act as filters
between the QCR and the QEVR. If a bit is set to 1 in the QNTR, the corresponding bit in the QEVR
will be set to 1 whenever the same bit in the QCR makes a negative transition, from 1 to 0. If a bit is
set to 1 in the QPTR, the corresponding bit in the QEVR will be set to 1 when the same bit in the
QCR makes a positive transition, from 0 to 1.
Questionable negative transition register (QNTR)
The
Questionable event register (QEVR)
(on page C-6) can be configured to respond to specific
transitions in the
Questionable condition register (QCR)
(on page C-5). The transitions and the
polarity of these transitions are specified in the
Questionable positive transition register (QPTR)
page C-6) and Questionable negative transition register (QNTR). These registers act as filters
between the QCR and the QEVR. If a bit is set to 1 in the QNTR, the corresponding bit in the QEVR
will be set to 1 whenever the same bit in the QCR makes a negative transition, from 1 to 0. If a bit is
set to 1 in the Questionable positive transition register (QPTR), the corresponding bit in the QEVR will
be set to 1 when the same bit in the QCR makes a positive transition, from 0 to 1.
Questionable event register (QEVR)
The questionable event register is made up of eight bits, which have the same significance as the
Questionable condition register (QCR)
(on page C-5), but have been filtered by the
positive transition register (QPTR)
Questionable negative transition register
