From b6f420f3f8a725161f9343877fc4f1020b89387f Mon Sep 17 00:00:00 2001 From: Jim Klimov Date: Mon, 7 Oct 2024 22:04:12 +0200 Subject: [PATCH] docs/man/usbhid-ups.txt: extra comments about CPS offdelay [#578] Closes: #578 Signed-off-by: Jim Klimov --- docs/man/usbhid-ups.txt | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/docs/man/usbhid-ups.txt b/docs/man/usbhid-ups.txt index 534f9977ac..485b763dbb 100644 --- a/docs/man/usbhid-ups.txt +++ b/docs/man/usbhid-ups.txt @@ -93,7 +93,8 @@ The default value is 20 (in seconds). Usually this *must be lower* than + Note that many Cyber Power Systems (CPS) models tend to divide this delay by 60 and round down, so the minimum advisable value is 60 to avoid powering off -immediately after NUT sends the shutdown command to the UPS. +immediately after NUT sends the shutdown command to the UPS. More details +below. *ondelay*='num':: Set the timer for the UPS to switch on in case the power returns after the @@ -347,6 +348,12 @@ Note that many Cyber Power Systems (CPS) models tend to divide `offdelay` by 60 and round down, so the minimum advisable value is 60 (seconds) to avoid powering off immediately after NUT sends the shutdown command to the UPS. +For many Cyberpower UPSs, `offdelay` must be set to `0` for normal behavior +(the load is restored when AC power returns). Setting `offdelay` above `0` +will restart the UPS load *regardless of whether or not power has returned*, +and setting `offdelay` below `0` will disable the auto-power-on function of +the UPS, keeping the load off even when power returns. + UPS does not set battery.charge.low but says OK ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~