Vega FIBERTRAC 31 Profibus PA Bedienungsanleitung PDF herunterladen (Seite 76)

11 Supplement

FIBERTRAC 31 • Probus PA

43833-EN-131119

Note:

The modules are available in two versions:

•

Short for Probus master supporting only one "Identier Format" byte, e.g. Allen

Bradley

•

Long for Probus master only supporting the "Identier Format" byte, e.g. Siemens

S7-300/400

Examplesoftelegramconguration

In the following you will see how the modules can be combined and how the appendant data tel-

egram is structured.

Example 1

•

AI FB1 (OUT)

•

AI FB2 (OUT)

•

AI FB3 (OUT)

Byte-

No.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

For-

mat

IEEE-754-Floating point

value

Sta-

tus

IEEE-754-Floating point

value

Sta-

tus

IEEE-754-Floating point

value

Sta-

tus

Value AI FB1 (OUT) AI

FB1

AI FB2 (OUT) AI

FB2

AI FB3 (OUT) AI

FB3

Example 2

•

AI FB1 (OUT)

•

Free Place

•

Free Place

Byte-No. 1 2 3 4 5

Format IEEE-754-Floating point value Status

Value AI FB1 (OUT) AI FB1

Note:

Bytes 6-15 are not used in this example.

Data format of the output signal

Byte4

Byte3

Byte2

Byte1

Byte0

Status Value (IEEE-754)

Fig. 24: Data format of the output signal

The status byte corresponds to prole 3.02 "Probus PA Prole for Process Control Devices" coded.

The status "Measured value OK" is coded as 80 (hex) (Bit7 = 1, Bit6 … 0 = 0).

The measured value is transferred as a 32 bit oating point number in the IEEE-754 format.

1 2 ... 71 72 73 74 75 76 77 78 79 80 81 ... 87 88

Kommentare zu diesen Handbüchern

Keine Kommentare

Vega FIBERTRAC 31 Profibus PA Bedienungsanleitung Seite 76

Kommentare zu diesen Handbüchern

Verwandte Produkte und Handbücher für Ausrüstung Vega FIBERTRAC 31 Profibus PA