Vega VEGABAR 52 Profibus PA Bedienungsanleitung PDF herunterladen (Seite 50)

10 Supplement

VEGABAR 52 • Probus PA

36719-EN-130321

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 (standard setting) with pressure value, temperature value and additional cyclical value:

•

AI (PA-OUT)

•

Temperature

•

Additional Cyclic Value

Byte-No.

1234 567891011121314

Format

Value

IEEE-754-

Floating point value

PA-OUT

(FB1)

Status

(FB1)

IEEE-754-

Floating point value

Temperature

(FB2)

IEEE-754-

Floating point value

Additional Cyclic

Value

Status

(FB2)

Status

Fig. 30: Telegram conguration example 1

Example 2 with pressure value and temperature value without additional cyclical value:

•

AI (PA-OUT)

•

Temperature

•

Free Place

Byte-No.

1234 5678910

Format

Value

IEEE-754-

Floating point value

PA-OUT

(FB1)

Status

(FB1)

IEEE-754-

Floating point value

Temperature

(FB2)

Status

(FB2)

Fig. 31: Telegram conguration example 2

Example 3 with pressure value and additional cyclical value without temperature value:

•

AI (PA-OUT)

•

Free Place

•

Additional Cyclic Value

Byte-No.

1234 5 6789 10

Status

(FB1)

IEEE-754-

Floating point value

PA-OUT

(FB1)

IEEE-754-

Floating point value

Additional Cyclic

Value

Format

Value

Fig. 32: Telegram conguration example 3

Data format of the output signal

Byte4

Byte3

Byte2

Byte1

Byte0

Status Value (IEEE-754)

Fig. 33: Data format of the output signal

The status byte corresponds to prole 3.0 "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 ... 45 46 47 48 49 50 51 52 53 54 55 ... 67 68

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