VEGA VEGASCAN 850 VEGA-ASCII signal output - Manual (Page 4)

4 VEGA-ASCII signal output VEGASCAN 850
Communication structure
2 Communication structure
The following functions are supported within
the data communication between VEGASCAN
850 and the connected process data
processing:
- Mode (VEGASCAN 850 is Slave)
VEGASCAN 850 does not transfer data
without request. The master station must
request all desired data.
- Instrument address (default value # 1)
By using a bus-compatible interface (e.g.
RS 485), operation of up to 9 instruments
on one interface is possible.
- Presentation:
All telegrams use ASCII characters and
can be read in clear text.
- Time-based image:
No time periods required for transmission.
- Value range (low resolution)
The value to be transmitted is provided
with a decimal point (penultimate position)
independent of the actual position of the
decimal point.
- Value range (high resolution)
The value to be transmitted is always
transferred without decimal point.
The decimal point as well as the unit of meas-
urement of the DCS value are not transmitted
by VEGASCAN 850!
This information must be completed by the
user with the software of the process data
processing.