VEGA Modbus-TCP, ASCII protocol User Manual
Page 27
27
2 ASCII protocol
Modbus-TCP, ASCII protocol • VEGAMET 391/624/625, VEGASCAN 693, PLICSRADIO C62
30768-EN-130701
Answer:
=001# 824.6 #kg
=002# 67.3 #%
=003#-824.6 #%
=004#-67.3 #m
$ Block enquiry with length
The range stated in the enquiry with PC/DCS values is delivered as
reply to the range enquiry. The measured value is transmitted with 11
positions as floating point and with unit.
Number of bytes
Character
Identifier
1
$
Begin
1 … 3
001 … 030 or 1 … 30
Separator
1
L or I
Quantity
1 … 3
001 … 030 or 1 … 30
End identification
1
CR
•
Identifier: "$" (1 character)
•
Start: No. of the requested PC/DCS output (1 … 3 characters)
•
Separator: "L" or "I" (1 sign)
•
Quantity: Number of requested PC/DCS outputs (1 … 3 signs)
•
End identification: Carriage Return CR (1 sign)
Total length of the telegram: 5 … 9 characters
"N"-times repetition of the following telegram
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
Enquiry of the control
system
Reply from the signal
conditioning instrument