VEGA Modbus-TCP, ASCII protocol User Manual
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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: