VEGA VEGACOM 557 VEGA ASCII protocol - Manual (Page 24)

24 VEGACOM 557 VEGA ASCII
VEGACOM 557 collects the measured values
of the VEGA signal conditioning instruments
VEGAMET 509, 512, 513, 514, 515 and 614
(via DISBUS) or VEGALOG 571 (via LOG-
BUS) and puts them in the temporary
memory for collection via the VEGA ASCII.
The method of storing the measured values
(for the higher-priority processing systems)
in the VEGACOM 557 temporary memory
differs depending on the selected configura-
tion. It depends on whether VEGACOM 557
is connected to the DISBUS or the LOGBUS,
and if DISBUS, also on the connected instru-
ment type. However, it can be also influenced
by VEGACOM 557 itself via DIL switches.
Note
On the VEGAMET 513, 514, 515 and 614
signal conditioning instruments, as well as on
the VEGALOG 571 processing system, the
individual configuration of the DCS outputs
with the adjustment software VVO is possi-
ble.
On VEGAMET 513, 514, 515 and 614 signal
conditioning instruments as well as the VE-
GALOG 571 processing system, it is addi-
tionally possible to enquire the conditions of
the contact inputs and outputs via VEGA-
COM 557.
Enquiry of DCS values from DISBUS
The addressing of the measured values for
VEGA ASCII is made instrument-orientated
for the DISBUS enquiry. I.e. the measured
values are enquired individually for each
VEGAMET.
Series 509 and 512 instruments deliver max.
3 measured values. The number of measured
values can be configured on the instrument.
On series 513, 514, 515 and 614 instruments,
the number of measured values (max. 7) can
be set via the adjustment program VVO or
directly on the instrument.
Data image in VEGACOM 557
Due to these two different series, it is neces-
sary to use two different telegrams for the
enquiry of measured values. With enquiry "P“
3 values are transmitted. With enquiry "M“,
VEGACOM 557 delivers a total of 7 meas-
ured values.
If one or several DCS outputs have been
assigned on the instrument, the respective
measured value is provided with an error
information during transmission. It is then
possible to distinguish between valid and
invalid values.
All values of an instrument are placed one
after the other.
Resolution
A selection between two resolutions of the
value range is possible:
1 low resolution: (switch 2.2 = OFF)
between -999.9 and +999.9
2 high resolution: (switch 2.2 = ON)
between -999999 and +999999
(actually only the range between
-32768 and +32767 is used)
In addition to the above mentioned possibili-
ties, the DCS values can be read out as a
block. Here also there are two different pos-
sible configurations.
In the first configuration, a total of 16 DCS
values are reserved for each VEGAMET. The
instruments are then imaged in the memory
according to their address.
4 Data image in VEGACOM 557