VEGA Modbus-TCP, ASCII protocol - Manual (Page 26)

26
2 ASCII protocol
Modbus-TCP, ASCII protocol • VEGAMET 391/624/625, VEGASCAN 693, PLICSRADIO C62
30768-EN-130701
Enquiry:
$001
Answer:
=001# 824.6 #kg
$ Block enquiry
All assigned PC/DCS values in the instrument are delivered as reply
to the block enquiry. The measured value is transmitted with 11 deci-
mal places as floating point and with unit.
Number of bytes Character
Identifier 1 $
End identification 1 CR
•
Identifier: "$" (1 character)
•
End identification: Carriage Return CR (1 sign)
Total length of the telegram: 2 characters
"N"-times repetition of the following telegram
(N=total number of assigned PC/DCS outputs)
Number of bytes Character
T1 1 =
DCS no. 3 001 … 030
T2 1 #
Value 11 -824.6
T3 1 #
Unit 0 … n xxx
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 error code "Exxx"
Formatting of the value:
Character Meaning
1 "- ": Minus with negative numbers
" ": Space with positive numbers
2 … 12 11-digit number with comma or error code
•
T3: "#" (1 character)
•
Unit: Unit as text (0 … n unit)
•
End identification: Carriage Return CR (1 sign)
Total length of the telegram: N*(18 characters+Unit character)
Enquiry:
$
Example:
Enquiry of the control
system
Reply from the signal
conditioning instrument
Example: