VEGA Modbus-TCP, ASCII protocol - Manual (Page 12)

12
2 ASCII protocol
Modbus-TCP, ASCII protocol • VEGAMET 391/624/625, VEGASCAN 693, PLICSRADIO C62
30768-EN-130701
•
End identification: Carriage Return CR (1 sign)
Total length of the telegram: 3 … 5 characters
Number of bytes Character
T1 1 =
DCS no. 3 001 … 030
T2 1 #
Value 5 … 6 -067.3
T3 1 %
End identification 1 CR
•
T1: "=" (1 character)
•
DCS no.: No. of the PC/DCS output as 3-digit decimal number
•
T2: "#" (1 character)
•
Value: Numerical value of the PC/DCS output or with interferred
measured value the text "FAULT"
Formatting of the value:
Character Meaning
1 "- ": Minus with negative numbers
" ": Space with positive numbers
2 … 4 3-digit number
5 ".": Decimal point
6 1-digit number (after the decimal point)
•
T3: "%" (1 character)
•
End identification: Carriage Return CR (1 sign)
Total length of the telegram: 12 … 13 characters
Note:
The % sign is a separator, not the unit %
Enquiry:
%001
Answer:
=001# 067.3%
% Block enquiry
As answer on the block enquiry, all PC/DCS values assigned in the
instrument are delivered. The measured value is transmitted with
three positions in front of the decimal point and one position after the
decimal point without unit.
Number of bytes Character
Identifier 1 %
End identification 1 CR
•
Identifier: "%" (1 character)
Reply from the signal
conditioning instrument
Example:
Enquiry of the control
system