VEGA VEGACOM 557 VEGA ASCII protocol - Manual (Page 32)

32 VEGACOM 557 VEGA ASCII
4.4 Enquiry as single value with low resolution
Low resolution = switch 2.2 = OFF
This telegram reads in a DCS value from VEGACOM 557. Depending on the position of switch
2.1., the DCS values are arranged differently. The assignment of the DCS numbers to the
VEGAMET addresses is stated in supplement A.
Answer of VEGACOM 557
Start character: S1 = 1 character "=“
Start character: S2 = 1 character "#“
Total length of the telegram: 12 or 13 characters
Telegram from processing system to VEGACOM 557
Identifier: 1 character, "%“
End identification: 1 character Chr (13) = CR = Carriage Return
Total length of the telegram: 5 characters
One repetition
1 2 3 4 5 6
3 positions in front of the decimal point
1 decimal point
1 position after the decimal point
"-“ with negative values
" " with positive values
valid measured value
1 2 3 4 5
‘FAULT’
Fault
Data image in VEGACOM 557
DCS DCS End
S1 no. S2 value2 identification
No. of bytes 1 3 1 5-6 2
Range (ASCII) = 001..255 #
DCS value or
fault %CR
Example = 001 # -067.3 %CR
DCS End
Identifier number identification
No. of bytes 1 3 1
Range (ASCII) % 001..255 CR
Example % 001 CR