RE: UPS & AS/400 talking to each other

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Sorry for the long delay on this.  Could you elaborate on this?  How do
we know whether we have the proper cable?  Are you talking power cable
or the serial port "comm" cable?  Is there a "spec" for this cable?

Dan Bale
IT - AS/400
Handleman Company
248-362-4400  Ext. 4952
D.Bale@Handleman.com

> -----Original Message-----
> From: Alan Addison [SMTP:ahaddison@home.com]
> Sent: Friday, September 21, 2001 3:06 PM
> To:   midrange-l@midrange.com
> Subject:      RE: UPS & AS/400 talking to each other
>
> One also has to watch for the correct cable for the AS/400.  If you
> don't
> have the proper one, then the AS/400 will shutdown immediately on
> getting
> the signal from the UPS that it is on backup power
>
> Alan Addison
>
> -----Original Message-----
> From: midrange-l-admin@midrange.com
> [mailto:midrange-l-admin@midrange.com]On Behalf Of Jim Langston
> Sent: Friday, September 21, 2001 2:35 PM
> To: midrange-l@midrange.com
> Subject: RE: UPS & AS/400 talking to each other
>
>
> We had ordered a UPS for our AS/400 and I started looking at the
> system settings for UPSes and asked the same question you did,
> how the heck does the AS/400 know how much power the UPS has?
>
> I received the AS/400 UPS and got my answer, there is indeed a
> communications cable that goes from the UPS to a special port
> on the AS/400.
>
> My understanding, without this cable, the AS/400 has no idea
> it's even on a UPS.  So CALC would be ignored, and any other
> settings dealing with UPSes.
>
> You should look at your UPS and see if there is a communications
> connector on it (I seem to recall it was a db9, although it might
> of been a 25 pin).  If it doesn't, your UPS is probably not
> designed with the AS/400 in mind.
>
> Also, since the AS/400 shut down immediately upon the power to
> the building being shut down, that makes me think your UPS is
> not powerful enough to run the AS/400.  Most likely the AS/400
> power supply saw a drop of AC voltage below it's minimum safety
> limit and shut off (I could be wrong on that, but I know that's
> how many other computer's power supplies work).
>
> I think you have a little research to do on both your current
> UPS and it's capabilities, and what the AS/400 requires for a
> UPS.
>
> Regards,
>
> Jim Langston
>
> Message: 1
> Subject: UPS & AS/400 talking to each other
> Date: Fri, 21 Sep 2001 12:57:52 -0400
> From: "Bale, Dan" <D.Bale@handleman.com>
> To: <MIDRANGE-L@midrange.com>
> Reply-To: midrange-l@midrange.com
>
> Somewhat related to my last post on SPCN...
>
> I noticed that my QUPSDLYTIM system value is set to *CALC.  How does
> the
> AS/400 know how much juice is left to be able to determine whether it
> needs to start shutting down?  Is there another cable that allows the
> UPS and AS/400 to communicate this information?  I don't think our
> UPS's
> have that, or if they do, they were never set up to do this.  If a
> comm
> cable is required, then what is the effect of the *CALC setting?
>
> Background for all this:  Last night, one of our branches cut power to
> the building to install a new A/C unit (unbeknownst to us), relying on
> the UPS to keep all of the computer equipment up for the "short" time
> that the electricity was going to kept off.  I was told by the branch
> manager that the AS/400 lost power immediately after the building
> power
> was turned off.  While the building power was off, we powered the
> AS/400
> back up, so this is how I know that the AS/400 was attached to the
> UPS.
> The IPL was proceeding when the UPS got completely drained 15 minutes
> later and then all equipment on the UPS went down.  Main power was
> restored shortly thereafter, the AS/400 IPL'd normally (!), got a
> signon
> screen within 20 minutes (a normal IPL for this box), nothing
> "damaged"
> as far as I could tell.
>
> Lessons learned:  Don't power the AS/400 back up until after main
> power
> was restored.  WHAT THE @#%* WAS I THINKING?
>
> Dan Bale
> IT - AS/400
> Handleman Company
> 248-362-4400  Ext. 4952
> D.Bale@Handleman.com