Vega VEGACOM 558 Ethernet Bedienungsanleitung PDF herunterladen (Seite 28)

28 VEGACOM 558 Ethernet

VEGALOG

571

6.3 Storage of measured values

when connected to LOGBUS

The addressing of measured values for

Modbus systems is "word-oriented". In

VEGACOM 558, a measured value is repre-

sented by two words, whereby the first word

includes the real measured value, the next

higher word the associated status informa-

tion. In the standard, the term "register word”

is also used instead of the term "word”. The

addressing is done via existing library calls

of a PLC (e.g. Modicon).

Measured value image when connected to

VEGALOG 571

DCS output 1

DCS output 2

DCS output 3

DCS output 255

Meas.

value

Meas.

value

Meas.

value

VEGALOG 571 can administrate up to 255

measurement loops. For the transfer of the

measured values of a measurement loop,

VEGALOG provides up to 255 DCS outputs.

One or several DCS outputs with any index

can be assigned to each measurement loop.

The configuration of VEGALOG 571 is done

with the VEGA adjustment software VVO. The

selected PC/DCS output defines where the

appropriate measured values can be col-

lected from the temporary memory of

VEGACOM 558.

Data image in VEGACOM 558

Temporary memory of

VEGACOM 558

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Vega VEGACOM 558 Ethernet Bedienungsanleitung Seite 28