VEGA Modbus-TCP, ASCII protocol - Manual (Page 25)

25
2 ASCII protocol
Modbus-TCP, ASCII protocol • VEGAMET 391/624/625, VEGASCAN 693, PLICSRADIO C62
30768-EN-130701
=001# 000673#%
=002# 00824#kg
=003#-000673#m
2.9 Measured value enquiry with command $
$ individual enquiry
The PC/DCS value stated in the enquiry is delivered as reply to the
individual enquiry. The measured value is transmitted with 11 decimal
places as floating point and with unit.
Number of bytes Character
Identifier 1 $
Begin 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)
•
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 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: 18 characters+Unit character
Enquiry of the control
system
Reply from the signal
conditioning instrument