sparkytex
Lifetime Supporting Member
Hey guys,
I'm at a waste water treatment plant trying to get their UV system running. I've traced the problem down to a AOI that's causing the failure in sequence. I Attached a few pictures of the AOI in the logic as well as the definitions, properties, and the AOI logic itself.
You will see in Rung 5 PHPPWWTP_UVGeneral.Seq_Start[1].ready is true and I've also seen that PHPPWWTP_UVGeneral.Seq_Start[1].Req_Start was also true which is the signal from another PLC telling the UV system to start. It isn't true in the screen shot because I've had to bypass the UV system which cancels that signal from the Treatment PLC.
I'm not super familiar with AOI's but know a bit about them. I can't seem to find what AOI "PHPPWWTP_UVGeneral.Seq_Start[1]" is missing which isn't allowing it to complete it's sequence. I tried to attach the PLC Program but it is too large, even in a compressed folder so I took a bunch of screen shots.
PHPPWWTP_UVGeneral.Seq_Start[1} AOI is what starts the UV system start sequence. There are 7 AOI sequence steps starting with #1 and its not finishing it's sequence. I know this because it has the visible Discrete outputs on the right side of the AOI saying showing the status "Done Start". It also Isn't showing it's "Command" output bit on the right side of the AOI either.
Can some one point me in the right direction as to where I can find out what's stopping this AOI from executing?
thanks,
Tex
I'm at a waste water treatment plant trying to get their UV system running. I've traced the problem down to a AOI that's causing the failure in sequence. I Attached a few pictures of the AOI in the logic as well as the definitions, properties, and the AOI logic itself.
You will see in Rung 5 PHPPWWTP_UVGeneral.Seq_Start[1].ready is true and I've also seen that PHPPWWTP_UVGeneral.Seq_Start[1].Req_Start was also true which is the signal from another PLC telling the UV system to start. It isn't true in the screen shot because I've had to bypass the UV system which cancels that signal from the Treatment PLC.
I'm not super familiar with AOI's but know a bit about them. I can't seem to find what AOI "PHPPWWTP_UVGeneral.Seq_Start[1]" is missing which isn't allowing it to complete it's sequence. I tried to attach the PLC Program but it is too large, even in a compressed folder so I took a bunch of screen shots.
PHPPWWTP_UVGeneral.Seq_Start[1} AOI is what starts the UV system start sequence. There are 7 AOI sequence steps starting with #1 and its not finishing it's sequence. I know this because it has the visible Discrete outputs on the right side of the AOI saying showing the status "Done Start". It also Isn't showing it's "Command" output bit on the right side of the AOI either.
Can some one point me in the right direction as to where I can find out what's stopping this AOI from executing?
thanks,
Tex