Vega VEGACOM 557 VEGA ASCII protocol Bedienungsanleitung Seite 21

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VEGACOM 557 VEGA ASCII 21
Bottom view of VEGACOM 557
Possible settings of DIL switch block 1 on the addi-
tional board
Switch settings on VEGACOM 557
3.2 Adjustment of the VEGA ASCII
interface
Three 8-pole DIL switch blocks as well as two
hook switches for configuration of the VEGA
ASCII interface to the DCS or the PLC are
located on the additional board.
The following adjustments for the VEGA
ASCII are made through these DIL-switch
blocks:
Switch 1
- selection of the interface type
- activation of the bus termination
- selection of the protocol
Switch 2
- selection of the baud rate
- number of data bits
- mode for parity bit
- resolution
- definition of the measured value image
Switch 3
- VEGA ASCII address of VEGACOM 557
Note:
When holding VEGACOM 557 for adjustment
of the DIL-switches 1 to 3 (shown in illustra-
tion 2.10), the following switch representation
can be applied directly.
Note:
When selecting the interfaces TTY and
RS 232, the hook switches must also be set
to the respective position.
Activation of the bus termination on RS 485 is
necessary when VEGACOM 557 is the last
participant. General rule: The first and the last
bus participant must be operated with bus
termination activated.
When using interface RS 422, the bus termi-
nation must always be activated on VEGA-
COM 557.
1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8
Multiple plug
Basic board
DIL switch
basic board
Front
plate
DIL switch blocks
additional board
Additional
board
2 1
1 2 3
Hook switches
additional
board
DIL switch block 1
(additional board)
Selection of the interface type
Bus termination for RS 485/
422
Protocol selection
TTY
RS 422, RS 485
RS 232
On
Off
VEGA ASCII
Factory setting
1
2
3
4
5
6
8
O
N
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