AI signal is coming underflow
We have aDIMF 2.0 - Bopp & Reuther Messtechnik GmbH device having range
from 90 to 100 %. it showing underflow even through we are simulating some value from field .
We are using AI845 card in 800xA system
Voted best answer
Please first check input signal - measure the input current and poliarity. It should be over 4 mA, with the correct poliarity
Please check and try with different settings for AI845:
- operation mode - single
- external power suppervision - false
- shunt mode - internal
- activate channel - true
- signal channel range - 4-20mA
As per the datasheet it supports 2 wire mode(Power, Signal) and since you are using Ai845 with Tu830 as non-redundant mode then use terminals B1,C2 for channel1 b3,c4 soon
If you are using Ai845 with TU845 then use B1,B2 and b3,b4 etc
Since module itself has 250Ohm resitance to convert equivalent 4-20mA to 1 to 5V so adding extra resitance is not required.
if distance is more than 600m then go for the 4 wire mode.