Start 5i25 with a firmware 5i25_g540_enc

sounds like you don't have the B inputs connected

I forgot to write about B inputs. On Halmeter it is too.
C10 payments working - I start a system without 5i25 through 2 LPT with back coupling through sino-300 and everything works. I apply Hal of such system. It seems to me that there is an error in a firmware. I looked for at different forums but did not find that someone would use such firmware. But maybe I that not correctly I do that.

Are you saying that:
hm2_5i25.0.encoder.NN.input-a
and
hm2_5i25.0.encoder.NN.input-b
both change but
hm2_5i25.0.encoder.NN.count
does not?

Yes quite so. Changes but only on 0.005
It occurs on encoder 01 and encoder 03 and encoder 05
the result changes from 0 to 0.005

I suspect you have a wiring error.
I just tested the5i25_g540_enc firmware
and it works as expected

Many thanks for the help! I will look for at myself an error.
I did a firmware by the attached file.