PT100 only displays 32767

[Dermie]

I have a samba SM70-J-RA22 and have configured the hardware for PT100 on input 0 and only ever get a reading of 32767 (open circuit). The jumpers 567 are BAB. The resistance across the sensor is 109ohms. I have tried input 1 as well and still only get 32767 when displaying on the hmi. When I setup a thermocouple  “K”  it works fine on each input. I connect one side of resistors to terminal 4 and the 2 legs off the other side of resistor to inputs 5 and 6. 

I did a firmware upgrade and a software upgrade and that did not help.

Any guidance would be appreciated.

[kratmel]

Please check JP11. It must be set to B for PT100 CM input 11.

[Dermie]

Thank you, it was the jp11 not set correctly.
If jp11 is set to B can one of the analogue  inputs #1 be used as a thermocouple input or do they both need to be pt100. I have a thermocouple on input #1 and it reads correctly sometimes then it gives strange numbers for a while.

[Flex727]

I believe JP11 applies only to the device connected to Input 11 (terminal 4). the others are set independently with other jumpers. You should be able to find a document on the Unitronics web site which will answer all your questions. Look for the "Install Guide" for the Samba.

[Dermie]

Thank you for the reply Flex727.

The install manual states to set jumper 11 to set to B if you are using a pt100 in AI 1 or 2 to create the CM point. The documentation implies I can have AI#0  as a PT100 and AI#1 as a thermocouple type K. The thermocouple input is not working properly and I wanted to confirm that I could mix the type of sensor I use on these inputs.

[Flex727]

18 minutes ago, Dermie said:

I wanted to confirm that I could mix the type of sensor I use on these inputs.

Yeah that does seem to be a bit confusing. Perhaps one of the other forum members can help, or you can send a message to Unitronics Support (support@unitronics.com).