Redundant configuration of two Smart-UPS RT 5000 XL UPS using PCNS

[Anonymous user]

Hi all - advice/comments/suggestions appreciated

I have two Smart-UPS RT 5000 XL UPS with two battery packs each configured as redundant in PCNS on 3 devices

UPS1 reports runtime of 54 minutes
UPS2 reports runtime of 36 minutes

(not sure why they would differ so much with same configuration and same load - support ticket needed)

My understanding is such that due to the redundant setup, both have to signal a situation for it to be an active event -
eg both have to be on battery for an 'On Battery Event' to be signalled; both have to be low battery for a 'Low Battery' event to be signalled. 
With this in mind, the longer runtime is the one I consider - ie 54 minutes.

In a scenario where I get multiple on battery and off battery events such that the wait duration is never exceeded I have to rely on the low battery notification to kick in

The devices need to be shutdown in sequential order.

My configuration in PCNS is:

Device 1
Wait duration from battery event of 600s (10mins) with a 10 minute allowance for command execution

Device 2
wait duration from battery event of 1200s (20mins) with a 2 minute allowance for command execution

Device 3
wait duration from battery event of 1500s (25mins) with a 2 minute allowance for command execution

thus my devices should be off in around 30 minutes provided the on battery event is active thru at least 25 minutes.

Both NMC are set the same as follows:

Max Required Delay - 12minutes
Low Battery - 4 Minutes
Shutdown Delay - 20 seconds

It's these latter numbers I'm not sure about.

1. Firstly,  I know my Low Battery Duration should be set higher (>12mins) , but to what value?  I believe 20minutes would be optimal.
2. I would still need the shutdown to occur sequentially however even if the Low Battery Event occurs.
3. I cannot set it the same on both as UPS2 complains not enough runtime.

- thanks in advance.

Stu

[Anonymous user · Accepted solution]

Hi all - advice/comments/suggestions appreciated

I have two Smart-UPS RT 5000 XL UPS with two battery packs each configured as redundant in PCNS on 3 devices

UPS1 reports runtime of 54 minutes
UPS2 reports runtime of 36 minutes

(not sure why they would differ so much with same configuration and same load - support ticket needed)

My understanding is such that due to the redundant setup, both have to signal a situation for it to be an active event -
eg both have to be on battery for an 'On Battery Event' to be signalled; both have to be low battery for a 'Low Battery' event to be signalled. 
With this in mind, the longer runtime is the one I consider - ie 54 minutes.

In a scenario where I get multiple on battery and off battery events such that the wait duration is never exceeded I have to rely on the low battery notification to kick in

The devices need to be shutdown in sequential order.

My configuration in PCNS is:

Device 1
Wait duration from battery event of 600s (10mins) with a 10 minute allowance for command execution

Device 2
wait duration from battery event of 1200s (20mins) with a 2 minute allowance for command execution

Device 3
wait duration from battery event of 1500s (25mins) with a 2 minute allowance for command execution

thus my devices should be off in around 30 minutes provided the on battery event is active thru at least 25 minutes.

Both NMC are set the same as follows:

Max Required Delay - 12minutes
Low Battery - 4 Minutes
Shutdown Delay - 20 seconds

It's these latter numbers I'm not sure about.

1. Firstly,  I know my Low Battery Duration should be set higher (>12mins) , but to what value?  I believe 20minutes would be optimal.
2. I would still need the shutdown to occur sequentially however even if the Low Battery Event occurs.
3. I cannot set it the same on both as UPS2 complains not enough runtime.

- thanks in advance.

Stu