Hello,

I am currently trying to query the actual flow velocity using Modbus over RS-485 but I don't get any response.

In the "mag5100-Transmitter-connections" image,

Black & Red Wires = 16V/4A DC Power = 81,82

Yellow Solid with Green = Sensor Signals = 83,0,83

Orange & Yellow = D+ and D- = 92, 93, terminated with a 120 ohm resistance.

The above is the connections between the MCU and the transmitter base board. I am able to power and it shows some reading.

I have configured the com settings as follows - factory default:

Baud: 19200 bps

Parity: Even

Stop-bits: 1

I send the following packet:

But I do not get any response from the mag5100. I have probed the D+ and D- lines and have validated the query being pumped out of the lines.

It would be great if someone could support me with this. 

Also, from the Tx display menu I am unable find the current comms edit settings. Any help with this would be appreciated.

Thanks,

VD 

Also,

Attaching the logic capture of the D+ and D- for your reference. As you can see, from the MCU end, data packet going out promptly.