What do these data mean or do they refer to?

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Antonio GA2 asked Oct 28 2018 at 5:23 AM Joshua S commented Oct 31 2018 at 6:46 PM

What do these data mean or do they refer to?

Create a server to receive flexsim model values and throw this data to me:

1 ===> It's the value that I wrote as an onCover event

0 ===> I do not know if it's because it refers to it using the modbus protocol

6 ===> I think he writes a simple record (16-bits)

-251 ===> I do not know if it refers to byte size

4 ===> It's the registration number

-256 ===> I do not know what it refers to either

My question is ... If I am correct or what does each of the data mean?

Software Version:

FlexSim 18.2.2

emulation modbus tcp coli

captura-de-pantalla-9.png (117.1 KiB)

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Answer 1 · 2018-10-30T20:18:02Z

Joshua S answered Oct 30 2018 at 8:18 PM Joshua S commented Oct 31 2018 at 6:46 PM

Modbus protocol has a set of rules for what it does with the information given to it. You are actually missing several 0s which are important to reading the instructions sent to and from a PLC. Before you converted it, the hex format would read as follows

"\x00\x01\x00\x00\x00\x06\xff\x05\x00\x04\xff\x00"

You'll have to look up Modus protocol on what each chunk of bytes does.

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