This is in reference to a Bristol 3335
I’m currently in a facing a new system to a legacy Bristol 3335 controller
And I’m trying to figure out how the mod bus addressing is set up for analog registers as I pulled them from a MODBUS master( Prosoft mvi56 mnet)
USING MODBUS TCP

I CAN PULL THE ANALOG REGISTERS STARTING AT REGISTER ZERO USING MY TYPICAL MODUS COMMAND THAT WERE SET UP HOWEVER I’M TRYING TO FIGURE OUT. THE SPECIFIC ADDRESS IS TO PULL FOR MY DISCREET/DIGITALS AND IF THEY READ IN AS WORDS ARE INDIVIDUAL BITS.

DOES ANYBODY HAVE ANY EXPERIENCE WITH THIS?

 

Use a Modbus Scanner Tool (like ModScan, SimplyModbus, or Wireshark if needed)
Scan FC 01 (Coils), FC 02 (Discrete Inputs) from 0–100.FC 03 (Holding Registers) from 0–200 and look for bit-pattern changes
Watch the response values when you toggle known digital points in the 3335.