Re: How long does a PWRDWNSYS restart(*no) actually take? -- MIDRANGE-L

If you give it say 2 extra minutes that should be fine. The program will
most likely wait for low battery or a specific time. My 25 cents is if the
power is out, public or gen. for more than say 5min it is going to be out
for a long time. So wait for 5min ( maybe ) and then just starting shutting
things down.

Small UPS's and even some larger ones don't do a good job of sensing
battery issues. Most vendors say batteries are good maybe 2-5yrs. You also
said you had Cache Batteries were done about 3yrs ago... Well those are
getting close to being done again. My thoughts are this.
#1 See when the batteries are due.
#2 When it is time to change them, the tech will fail them.
#3 Bring the system to a Restricted State.
#4 Once in a restricted state remove input power to the UPS. This will sim
a power failure and give a pretty good test of the UPS/Batteries. Wait for
5min plus the time your system takes to shutdown. If they don't hold get
new batteries. If were me, I would get new batteries and swap them out
while things are down...

On Fri, Jul 28, 2017 at 7:17 AM, Jim Hawkins <jhawkins@xxxxxxxxxxxx> wrote:

I have been tasked to write a program to monitor the UPS on our IBM power
system. I found a good base program-so that is all good. We have a
generator
that is supposed to kick in within the 1st minute of a power failure. My
question is more of "what if the generator fails?" From my research, it
appears that the ups on the system will last for about 20 minutes.

We do an IPL each week (pwrdwnsys *immed restart(*yes)), (it is what it is,
I'm not rocking the boat on this one, so save your breath). What I see in
the log is entries indicating: this ended, that ended, etc. for about a
minute and a half, then nothing for 32 minutes when I see "Unattended IPL
in
progress".

If the generator fails, I want to power down the system, but I am not sure
how much time I have to wait. The last time we did a pwrdwnsys
restart(*no)
was 3 years ago when we had to replace the cache battery-and I don't recall
that far back (lol).

I want the system to power down on my terms, not the terms of the UPS. So,
good folks, how much time do I really have to power down, before my UPS
runs
out of batteries? (Yes, I will allocate a little extra for the unexpected
and the fact the batteries are 7+ years old.) Just simply, at what point is
the system powered off?

(I will be away from my email from noon today until next week)

TIA

Jim Hawkins

Programmer Analyst

Interkal LLC

Kalamazoo, MI

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