Niagara AX and boolean command failure alarms

[ccnster]

Can anybody clue me in on how to set up a boolean command failure alarm to use for a pump proof? I need to use pump s/s and status to generate an alarm. I'd think it would be easy, but it's not very intuitive. I can't figure out where to enter the comparison value.

thanks

[tshort]

Have you looked in the kitControl pallete? There is tons of logic blocks in there that you can use to create your desired logic on the wiresheet. If you've been here let me know and I'll work up some quick logic as an example.

[gnomethang]

If you just want to set your own logic up I would do the following:

Link s/s and status to an XOr then feed the result to an AND with the S/S (This will guard against the flow condition when pumps disabled e.g. running in Hand).
The feed the result through a Boolean delay (set your fail time) and finally to a boolean Writable (failure point) with a BooleanCommandFailureAlarmExt to give the alarm condition.

Is that what you were after?.

I have an image of this logic but cannot access my FTP at the moment (Senior moment on password). You can mail me if you need to and I can send a bog or a screen dump. As Travis said its all in the kitControl pallette

Barry

[checkvalve]

add the BooleanCommandFailureAlarmExt to your boolean point that is commanding the pump on. Link from the boolean point which is your pump status to the 'feedback value' under the offNormalAlgorithm.

To make it more obvious you can right click the boolean point with the alarm ext and select composite. Drill down in the tree to the offNormalAlgorithm and double click the 'feedback value', then click ok. This should create a slot on the boolean point that is pinned on the glyph. You can link your boolean pump status point to that slot on the boolean pump command point.

Make sure to set the inhibit time on the alarm extension to allow time for the feedback to register, this will cut down on nuisance alarms.

[gnomethang]

Much Easier, Controlvalve!

[ccnster]

It works!

thanks for your help