VEGA Modbus-TCP, ASCII protocol - Manual (Page 28)

28
2 ASCII protocol
Modbus-TCP, ASCII protocol • VEGAMET 391/624/625, VEGASCAN 693, PLICSRADIO C62
30768-EN-130701
•
T3: "#" (1 character)
•
Unit: Unit as text (0 … n unit)
•
End identification: Carriage Return CR (1 sign)
Total length of the telegram: Number*(14 characters+Unit character)
Enquiry:
$001L003
Answer:
=001# 67.3 #kg
=002# 824.3 #%
=003#-67.3 #m
$ Block enquiry with range
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 -
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 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"
Example:
Enquiry of the control
system
Reply from the signal
conditioning instrument