Modbus ascii - what does the response from the controller mean?

E

Egor Nikitin2019-08-28 15:18:34

Modbus

Egor Nikitin, 2019-08-28 15:18:34

I have a DVP-12SA2 controller. I connect to it via an rs cable and work with it using the modbus ascii protocol.
The bottom line is this ... I send a request to read the register: ": 0206126C2000E1"
I get the answer: : 02860771
I don’t understand what’s going on ... Help me figure out who worked with this protocol.

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Alexander Ananiev, 2019-08-28
@SaNNy32

It looks like 86 is a modbus exception. The error code should follow. Read the protocol specification for more details.