M. Ada

The only difference I've found from my experience was between DRT1-AD04H and DRT2-AD04H is auto baud rate detection on the drt2. Other differences are not worth mentioning.  But I think maybe there is a chance that old DRM model will have a problem with drt2 analog " NOT sure" 

Hi all I have this problem that has been bothering me for months. I have a DRT1-AD04H connected to C200hw-drm21 as a master. The signal to the drt is 4-20 ma which is fed from a conductivity sensor. I checked the signal and at the output of the sensor and the input of the DRT1 and it is ok. It changes according to the changes in the process. I am also able to force the output signal of the conductivity sensor.   My problem is that the reading on the IR Memory is showing maximum reading with some variations  always. The bit 15 changes to 1 when I remove the sensor from the process which should be 4 mA. But I haven't tried to force 4 mA. I have tried to replace by DRT2-AD04H but no luck. The only change was that it always show maximum reading with no variations and no matter what I do.   I have checked the broken wires LED "not led for my input"  and the PIN settings. I'm not using a software configrator. I also checked the terminal resistor. Also there are no NS or MS errors. I'm sure I'm checking the right address because I'm monitoring the change from SCADA and the PLC memory as well.