VEGA VEGACOM 557 VEGA ASCII protocol - Manual (Page 40)

40 VEGACOM 557 VEGA ASCII
Data image in VEGACOM 557
DCS DCS Ende
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 DCS End
Identifier Address T1 number T1 number identification
No. of bytes 1 1 1 3 1 3 1
Range (ASCII) % 0..9 , 001..255 L 001..255 CR
Example % 2 , 001 L 2 CR
Telegram from processing system to VEGACOM 557
Identifier: 1 character, "%“
T1: 1 character ",“ (comma)
T2: 1 character "L“
End identification: 1 character Chr (13) = CR = Carriage Return
Total length of the telegram: 11 characters
Answer of VEGACOM 557
n (n= stated number) repetitions
Start character: S1 = 1 character "=“
Address: Addr = 1 character VEGACOM 557 address
Separating character: S2 = 1 character ",“ (comma)
Start character: S3 = 1 character "#“
Total length of the telegram: 14 or 15 characters
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
4.8 Enquiry as range with address and low resolution
Low resolution = switch 2.2 = OFF
This telegram reads in a range of DCS values. The number is transferred with the enquiry.
Depending on the position of the switch 2.1, the DCS values are arranged differently. The
assignment of the DCS numbers to the VEGAMET addresses is stated in supplement A. In
addition to chapter "4.6 Enquiry as block with address and low resolution“ another address
from 0 to 9 is transferred, so that several VEGACOM 557 can be operated on one BUS sys-
tem (e.g. via a RS 485 interface).