Hi

I am looking to read PT100 sensors and digital inputs from a novus digiral module http://www.novus.com.br/site/default.asp?TroncoID=621808&SecaoID=819191&SubsecaoID=0&Template=../catalogos/layout_produto.asp&ProdutoID=748482

Can you confirm how this can be done with the dt85 sensor port I was looking at something like 1MODBUS(AD2,R1:1,=12CV) to read the digital state and require some assistance as to how to read the PT100 and scale it correctly

HI ITS,

I have checked that Novus DigiRail-2R.

Brand new equipment has a MODBUS address of 247, and two digital output states reside in register 8 and 9 (if you are reading them through holding register) or address 0 and 1 (if you are reading them through coil type register.
Remember to shift the register address by 1 from the information in the manual (address 8 means register 40009).

Therefore you can use 1MODBUS(AD247,R1:1,"Digital State 1") or 1MODBUS(AD247,R3:9,"Digital State 1")

PT100 reading does not need to be scaled. You just need to define the channel (according to PT100 types: 385 (European standard) or 392 (US standard)) depending on your terminal.

If you are using terminal 1+ and 1- for 2 wire RTD, then you can declare 1PT392
If you are using 3 wire/ 4 wire RTD, you have to wire it according to 3 wire/ 4 wire resistance configuration and define it as channel option: 1PT392(3W) or 1PT392(4W)

Best regards,
Rudy Gunawan