VEGA VEGACOM 557 VEGA ASCII protocol - Manual (Page 30)

30 VEGACOM 557 VEGA ASCII
4.3 Enquiry as block with low resolution
Low resolution = switch 2.2 = OFF
This telegram reads in all DCS values, i.e. 255 values are always transferred together. Each
DCS value is provided with a number. Depending on the position of switch 2.1, the DCS val-
ues are arranged differently. The assignment of the DCS numbers to the VEGAMET ad-
dresses is stated in supplement A.
Answer of VEGACOM 557
Start character: S1 = 1 character "=“
Start character: S2 = 1 character "#“
Total length of the telegram: 255 * 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: 2 characters
255 repetitions
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
End
Identifier identification
No. of bytes 1 1
Range (ASCII) % CR
Example % CR
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