VEGA VEGACOM 557 VEGA ASCII protocol - Manual (Page 38)

38 VEGACOM 557 VEGA ASCII
4.7 Enquiry as single value with address and low resolution
Low resolution = switch 2.2 = OFF
This telegram reads exactly one DCS value. Depending of the position of the switch 2.1, the
DCS values are arranged differently. The assignment of the DCS number to the VEGAMET
addresses is stated in supplement A. In addition to chapter "4.6 Enquiry as block with ad-
dress and low resolution“, an address from 0 to 9 is transferred so that several VEGACOM
557 can be operated on one BUS system (e.g. via a RS 485 interface)
Answer of VEGACOM 557
Start character: S1 = 1 character "=“
Address: Addr = 1 character VEGACOM 557 address
Separating character: T1 = 1 character ",“ (comma)
Start character: S2 = 1 character "#“
Total length of the telegram: 14 or 15 characters
Telegram from processing system to VEGACOM 557
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 meas. value
1 2 3 4 5
‘FAULT’
Fault
Identifier: 1 character, "%“
T1: 1 character ",“ (comma)
End identification: 1 character Chr (13) = CR = Carriage Return
Total length of the telegram: 7 characters
Data image in VEGACOM 557
DCS DCS End
S1 Addr T1 no. S2 value2 identification
No. of bytes 1 1 1 3 1 5-6 2
Range (ASCII) = 0..9 , 001..255 #
DCS value
or fault %CR
Example = 2 , 001 # -067.3 %CR
DCS End
Identifier Address T1 number identification
No. of bytes 1 1 1 3 1
Range (ASCII) % 0..9 , 001..255 CR
Example % 2 , 001 CR