Siemens SIMATIC TI500 Uživatelský manuál stáhnout pdf (Strana 76)

Modbus Commands

C-27

TIWAY I Gateway User Manual

This

command permits the collection of constant (K) memory

. The formats of

the command and response are as follows.

I000000

Request: aa 42 llll nnnn XXXX

Checksum (XXXX)

Number of locations to collect (nnnn)

Starting location to collect from (llll)

Command 66 (42 hex)

Address (aa)

Figur

e C-33

Command

66 — Request

I000000

Response: aa 42 bb dddd . . . XXXX

Checksum (XXXX)

K-memory data

Number of data bytes to follow (bb)

Command 66 (42 hex)

PLC TIWAY network address (aa)

Figur

e C-34

Command

66 — Response

This command permits the collection of W

ord Output memory

. The formats

of the command and response are as follows.

I000000

Request: aa 43 llll nnnn XXXX

Checksum (XXXX)

Number of locations to collect (nnnn)

Starting location to collect from (llll)

Command 67 (43 hex)

Address (aa)

Figur

e C-35

Command

67 — Request

I000000

Response: aa 43 bb dddd . . . XXXX

Checksum (XXXX)

WY memory data

Number of data bytes to follow (bb)

Command 67 (43 hex)

PLC TIWAY network address (aa)

Figur

e C-36

Command

67 — Response

Command 66 —

Read K Memory

Command 67 —

Read WY Memory

1 2 ... 71 72 73 74 75 76 77 78 79 80 81 ... 93 94

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