VEGA VEGACOM 558 Ethernet - Manual (Page 26)

26 VEGACOM 558 Ethernet
6.2 Storage of contact inputs/out-
puts when connected to DISBUS
Beside the previously described measured
values, it is also possible to transmit switch-
ing conditions of the VEGAMET 513, 514 and
515 signal conditioning instruments via
VEGACOM 558.
This particularly includes:
- status of the contact inputs (key switch
position, etc.)
- status of the contact outputs (relay or tran-
sistor outputs)
In contrast to the image of the measured
values, the image of the switching status is
"bit oriented". In the standard, these status
bits are also called register bits. The ad-
dressing of the register bits for Modbus
systems is "bit oriented". In VEGACOM 558,
a switching status is represented as register
bit, whereby all available information of a
VEGAMET is saved in an associated block of
16 register bits. The storage of a 16 register
bit block within VEGACOM 558 is controlled
via the setting of the DISBUS address on
VEGAMET. The addressing by means of the
control system is normally done by existing
library calls of a process control system
(.e.g. Modicon).
Image of the switching status in VEGACOM 558 for
VEGAMET 513, 514, 515 or 614
on
VEGAMET
513
!
ESC OK
- +
100 %
CONNECT
on
VEGAMET
513
!
ESC OK
- +
100 %
CONNECT
on
VEGAMET
513
!
ESC OK
- +
100 %
CONNECT
on
VEGAMET
513
!
ESC OK
- +
100 %
CONNECT
16 register bits from VEGAMET #2
16 register bits from VEGAMET #1
16 register bits from VEGAMET #15
Data image in VEGACOM 558
Temporary memory
VEGACOM 558