Double return programming question

[srobertb]

Hello!

I am in the very early stages of planning a tank upgrade.

I would like to run 2 COR-15 returns at 50%. If something happens to one (RPM’s drop or temp shoots up), I’d like the other one to kick up to 100%. I know I can do this remotely but I’m wondering if I can setup Neptune to do it automatically?

Thanks

 

[blaxsun]

I believe you can, yes. I think the way you want to set it up is program both with a 50% schedule and then enter something like this in the programming for each:

Fallback OFF
Set 50
If Output COR_15_A Percent < 25 Then 85

Fallback OFF
Set 50
If Output COR_15_B Percent < 25 Then 85

You could also set the fallback to a value of 50. I'm not sure if the Percent < 25 will work or if you need something like this:

If COR_15_A OFF Then 85

Not sure of the exact commands available to you as I'm just away from my desktop.

 

[SuncrestReef]

While the programming @blaxsun posted above will work, it doesn’t actually kick in based on the COR RPMs or temperature. The Apex doesn’t have any programming capable of reacting to those parameters even though they are displayed on the dashboard.

The closest you can get is to leverage the If Error command which reacts to the conditions specified on the COR module setup screen:

[COR_A]
Fallback 50
Set 50
If Error COR_B Then ON

Since the If Error command does not support percentages (see https://forum.neptunesystems.com/showthread.php?20677-Using-percentages-in-programming), you can only set it to ON or OFF, but the COR treats ON as 100%, so that effectively does what you’re requesting.

You can find more about If Error and percentages in my Apex Command Reference article:

https://www.reef2reef.com/ams/apex-programming-command-reference.771/

 

[blaxsun]

Thanks @SuncrestReef for the additional Neptune programming insight! At some point (like the Op) I want to add a second IOTA pump and this is greatly appreciated.