APS 6RL Series, Руководство по эксплуатации

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6RL SERIES OPERATION MANUAL
SECTION 7: REMOTE PROGRAMMING
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2018 by Adaptive Power Systems, Inc. (APS) • All Rights Reserved • No reproduction without written authorization from APS.
6RL Series Regenerative DC Load Operation Manual Page 164 of 204
7.12.17 Alarm Management Commands
In remote control operation, it is important to manage alarms correctly. This can be done
the same way as in manual control. When using SCPI command language, unit alarms are
indicated via the status register, which can be polled. Furthermore, most alarms have to be
acknowledged.
7.12.17.1 Reading unit alarms
Reading unit alarms should happen in certain intervals, by querying the Questionable status
register by either the sub register CONDITION or EVENT. The commands STAT:QUES:COND?
or STAT:QUES? resp. STAT:QUES:EVEN? return a value that represents certain bits (see
Status registers), indicating various statuses. When a bit is set, it means a certain alarm is
present.
7.12.17.2 Acknowledging unit alarms
In order to make the user take notice of unit alarms, they have to be acknowledged after
they occurred and vanished again. This will delete those alarms from the status register and
should be only be done after they have been recorded. To delete/acknowledge an alarm,
the command SYST:ERR? resp. SYST:ERR:ALL? is used, which also serves to query other
errors.
In case one or multiple alarms are still present, they won't be cleared from the register by
reading it.
There is one exception in handling, the OT (over temperature) error. This doesn't require
extra acknowledgement and thus won't be indicated anymore in CONDITION once it is gone.
7.12.17.3 Alarm counters
These counters count alarm occurrences since the last time the unit was powered. They can
be read by commands at any time, are not stored when the unit is switched off and are
purged by reading.
Command Description
SYSTem:ALARm:COUNt:OVOLtage? Counts over voltage alarms (OVP, adjustable threshold)
SYSTem:ALARm:COUNt:OTEMperature? Counts over temperature alarms (OT, not adjustable)
SYSTem:ALARm:COUNt:OPOWer? Counts over power alarms (OPP, adjustable threshold)
SYSTem:ALARm:COUNt:OCURrent? Counts over current alarms (OCP, adjustable threshold)
SYSTem:ALARm:COUNt:PFAil? Counts power fail alarms (PF, not adjustable)
Example: You are running the unit in remote control and poll the alarm status with
the STAT:QUES:COND? command at a certain interval and you always receive value 3072.
This is the sum of the bit values of bits 10 (remote) and 11 (output/input on). It tells you that
remote control is active and the DC Input is switched on. Then a unit alarm occurs caused by
the unit overheating. When reading the questionable register the next time, bit 3 should
indicate the OT alarm for you to take notice. Additionally, the DC Input might be indicated as
switched off. Thus the returned value could be 1032 or 3080. Both contain bit's 3 value of 8.