Micromod MOD: Modcell 2050R MODBUS Communications Manual do Utilizador descarregar pdf (Página 41)

IB-23C650M

MODBUS PROTOCOL

Preset Single Register

Master Message Format Bytes

0 1 2 & 3 4 & 5 6 & 7

Device Address Function Code Register Number Register Data CRC

Slave Response (simple echo) Bytes

0 1 2 & 3 4 & 5 6 & 7

Device Address Function Code Register Number Register Data CRC

Loopback Diagnostic Test

Master Message Format Bytes

0 1 2 & 3 4 & 5 6 & 7

Device Address Function Code Diagnostic Code

(0000 only)

Data (ignored) CRC

Slave Response (simple echo) Bytes

0 1 2 & 3 4 & 5 6 & 7

Device Address Function Code Diagnostic Code

(0000 only)

Data (ignored) CRC

Force Multiple Coils

Master Message Format Bytes

0 1 2 & 3 4 & 5 6 7

...

x+1 &

x+2

Device

Address

Function

Code

Starting

Coil

Number

of Coils

Number

of Data

Bytes

Data Byte

... Data

Byte n

CRC

Slave Response Bytes

0 1 2 & 3 4 & 5 6 & 7

Device Address Function Code Starting Coil Number Number of Coils CRC

1 2 ... 36 37 38 39 40 41 42 43 44 45 46 ... 69 70

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Micromod MOD: Modcell 2050R MODBUS Communications Manual do Utilizador Página 41

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