Despatch Protocol 3 Modbus Communications Uživatelský manuál stáhnout pdf (Strana 10)

ABOUT THIS MANUAL Modbus Programming Manual

10 Version 2

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Function 06 - Write Single Register

Writes two bytes to a specified word address.

QUERY

Function

Address of Word

Value to write

RESPONSE

Function

Address of Word

Value written

Note:

The Response normally returns the same data as the Query.

Function 08 - Loopback Diagnostic Test

QUERY

Function

Diagnostic Code

Value

HI =00

LO=00

RESPONSE

Function

Sub-function

Value

HI=00

LO=00

Note:

The Response normally returns the same data as the loopback Query. Other Diagnostic

Codes are not supported.

Function 16 - Write Multiple Registers (0x10 Hex)

Writes consecutive word (two-byte) values starting at the specified address.

QUERY

Function

Write

Address

Number of Words

to Write

Number of

Query Bytes

Query Byte

Query

Byte

etc

Last Query Byte

→

RESPONSE

Function

Word Address

Number of Words

Note:

The number of data bytes that can be written in one message is 253 bytes.

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 51 52

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