VEGA Modbus-TCP, ASCII protocol - Manual (Page 15)

15
2 ASCII protocol
Modbus-TCP, ASCII protocol • VEGAMET 391/624/625, VEGASCAN 693, PLICSRADIO C62
30768-EN-130701
Answer:
=001# 067.3%
=002# 824.6%
=003#-067.3%
% Block enquiry with range
As answer to the range enquiry, the range stated in the enquiry with
PC/DCS values is delivered. The measured value is transmitted with
three decimal places in front of the decimal point and one decimal
place after the decimal point without unit.
Number of bytes Character
Identifier 1 %
Begin 1 … 3 001 … 030 or 1 … 30
Separator 1 -
End 1 … 3 001 … 030 or 1 … 30
End identification 1 CR
•
Identifier: "%" (1 character)
•
Start: Start no. of the requested PC/DCS output (1 … 3 charac-
ters)
•
Separator: "-" (1 sign)
•
End: End no. of the requested PC/DCS output (1 … 3 characters)
•
End identification: Carriage Return CR (1 sign)
Total length of the telegram: 5 … 9 characters
(End-Start+1)-times repetition of the following telegram
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
Enquiry of the control
system
Reply from the signal
conditioning instrument