8-12 Status Structure
Operation event status
The used bits of the operation event register (shown in Figure 8-5) are described as follows:
• Bit
B1, voltage protection channel #1 (VPT1) — Set bit indicates that the battery
channel (#1) is in voltage protection mode. In this mode, the output has been turned off
and the front panel displays “VPT”. (Battery channel only — for the charger channel, see
Bit 2.)
• Bit B2, v
oltage protection channel #2 (VPT2) — Set bit indicates that the charger chan-
nel (#2) is in voltage protection mode. In this mode, the output has been turned off and
the
front panel displays “VPT”. (Charger channel only — for the battery channel, see Bit
1.)
• Bit B3,
current limit #1 (CL1) — Set bit indicates that the battery channel’s (#1) output
is in current limit. This bit clears when the instrument is no longer in current limit.
(Battery channel only — for the charger channel, see Bit 7.)
• Bit
B4, current limit tripped #1 (CLT1) — Set bit indicates that the battery channel’s
(#1) output has turned off due to a current limit trip condition. This bit clears when the
output is turned back on. (Battery channel only — for the charger channel, see Bit 8.)
• Bit B5,
heat sink shutdown (HSS) — This bit indicates that the output has turned off
due to the output stage heat sink overheating.
• Bit B6,
power supply shutdown (PSS) — This bit indicates that the output has turned
off due to the main AC/DC power supply heat sink overheating.
• Bit B7, current limit #2 (CL2) — Se
t bit indicates that the charger channel’s (#2) output
is in current limit. This bit clears when the instrument is no longer in current limit.
(Charger channel only—for the battery channel, see Bit 3.)
• Bit B8,
current limit tripped #2 (CLT2) — Set bit indicates that the charger channel’s
(#2) output has turned off due to a current limit trip condition. This bit clears when the
output is turned back on (charger channel only — for the battery channel, see Bit 4).
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