Siemens SIMATIC TI500 Instrukcja Użytkownika Pobierz pdf (Strona 75)

Modbus Commands

C-26

TIWAY I Gateway User Manual

C.3 User-Defined Modbus Commands

There

are three user

-defined commands implemented in the TIW

AY I

Gateway

. These commands, described below

, allow the Gateway to work

with the IDT operator interface family of products.

This command permits the collection of Control Relay (C) data. The format

of the command is as follows.

I000000

Request: aa 41 llll nnnn XXXX

Checksum (XXXX)

Number of points to collect (nnnn)

Starting point to collect from (llll)

Command 65 (41 hex)

Address (aa)

Figur

e C-31

Command

65 — Request

The response for this command is as follows.

I000000

Response: aa 41 bb dd

dd . . .

XXXX

Checksum (XXXX)

C data: 0 – of

f, 1 – on

Number of data bytes to follow (bb)

Command 65 (41 hex)

PLC TIWAY network address (aa)

Figur

e C-32

Command

65 — Response

Command 65 —

Read C Memory

1 2 ... 70 71 72 73 74 75 76 77 78 79 80 ... 93 94

Brak uwag

Siemens SIMATIC TI500 Instrukcja Użytkownika Strona 75