On Thu, 23 Apr 2020, Marc Franquesa wrote:

...this email reports:

Power ups UPSdevice battery-low notification
UPS:         [email protected]
Notice type: LOWBATT
Message:     battery-low
Sun, 19 Apr 2020 12:10:27 +0200

Charge                    73%
Charge Low                20%
Runtime                   15m52s
...
Delay Shutdown            20s
Delay Start               30s
Firmware                  02
Load                      21%
Power Nominal             1200VA
Status                    FSD
ALARM                     OB LB

Assuming the battery is ok, then how long does it take this system to shut down? Is a Delay Shutdown of only 20 sec enough?

So, indeed was in LowBattery and FSD shutdown, however note that the current charge was 73% >> 20% low battery, so why it set LB when there were enough battery to run? Is this a comm problem, device issue, driver ?

System administrators sometimes use the command
 upsrw -s battery.charge.low=75 -u <upsuser> -p <sekret> <myups>
to speed up NUT testing.  Do you have such a command lurking somewhere?

A) Can upsched introduce some race-conditions making a timer cancel cancel other timers not related ?

The upssched timers operate independently of one another. Unless you have strange logic in upssched-cmd the heartbeat timers should not affect any other timer. If you are shutting down on LB, then why do you need timers in upssched (apart from the heartbeart)?

Roger
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