MarkNightingale
Lifetime Supporting Member + Moderator
Good Morning All,
I have a customer with a problem with a PLC5 installation.
There is basically a loop which is writing values to 32 filling valves.
The logic is therefore identical for all 32 valves.
However, one valve is playing up and not opening an closing like it should.
The valve is opened using 4-20mA. I can force the valve open and closed to the exact position i require, by forcing a value into the 4-20mA.
The problem it seems is the value coming from the 'loop' is always wrong. But it works for all other 32 'loops'.
The one that isn't working is Valve number 4, so it's not even like its and issue with the loop cutting off early.
Before i have exported RSLogix 5000 files to a .L5K file and then re-opened, and that has cured some anamolays i have had.
Is there some sort of feature like this with PLC5?
I am baffled as to whats happening.
Cheers
Mark
I have a customer with a problem with a PLC5 installation.
There is basically a loop which is writing values to 32 filling valves.
The logic is therefore identical for all 32 valves.
However, one valve is playing up and not opening an closing like it should.
The valve is opened using 4-20mA. I can force the valve open and closed to the exact position i require, by forcing a value into the 4-20mA.
The problem it seems is the value coming from the 'loop' is always wrong. But it works for all other 32 'loops'.
The one that isn't working is Valve number 4, so it's not even like its and issue with the loop cutting off early.
Before i have exported RSLogix 5000 files to a .L5K file and then re-opened, and that has cured some anamolays i have had.
Is there some sort of feature like this with PLC5?
I am baffled as to whats happening.
Cheers
Mark