keep last measuremet before fault

[hane6]

way to maintain the last measured value before the break

[Emil]

Hi Hanne6,

Simple soluiton:

1. Each scan, out of Power up, store MI39 to any other, buffer MI, let say MI139.

2. On Power up, store back buffer value (MI139 in our example) back to MI39.

You can use SB2 - power uop bit as condition to perform the mentioned logic. In point 1 - use N.C. contact. In point 2 - N.O.

[hane6]

Ok

I forgot the important word in the title, "when the measurement wire is broken. etc."

So, we have power on. Meassurement signal is 4...20 mA.

So input value "204" means 4mA. Limit 170 can indicate, that there is a fault in measurement...