Hello,

we want to include an alarm in our plant for a flow transmitter.

Lets say if the flow transmitter records a flow of more than 140 m3/hour for 10 minutes long, we want an alarm to go off.

How can I do this?

I was thinking about a compare blok, compare the analog value of the flow transmitter (FT) with the value of 140 m3/h. If 140-FT>0 return 1,

but how can I combine this with a timer that only will give 1 as output if the 1 of the input of 1 is continous, for at least 10 minutes? Then I could direct this output to an alarm block.

regards,

Hello,

take a look at the attachment.

is what you are looking for??

Yes, only which fb is that so I could implement it with blocks like the picture I have attached?

Closed cause question posted twice.

The second thread with the subject Alarm if flow is above a certain level for 10 minutes long is published within the conference Process Control Systems SIMATIC PCS 7.

Best regards
Min_Moderator