Vega Modbus-TCP, ASCII protocol Bedienungsanleitung PDF herunterladen (Seite 22)

2 ASCII protocol

Modbus-TCP, ASCII protocol • VEGAMET 391/624/625, VEGASCAN 693, PLICSRADIO C62

30768-EN-130701

"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 7 -000673

T3 1 #

Unit 0 … n xxx

End identication 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 text "FAU LT "

Formatting of the value:

Character Meaning

1 "- ": Minus with negative numbers

" ": Space with positive numbers

2 … 7 6-digit number after the decimal point

•

T3: "#" (1 character)

•

Unit: Unit as text (0 … n unit)

•

End identication: Carriage Return CR (1 sign)

Total length of the telegram: N*(14 characters+Unit character)

Enquiry:

Answer:

=001# 000673#kg

=002# 008246#%

=003#-000673#m

=004#-000673#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 six

decimal places without decimal point and with unit.

Number of bytes Character

Identier 1 ?

Begin 1 … 3 001 … 030 or 1 … 30

Separator 1 L or I

Quantity 1 … 3 001 … 030 or 1 … 30

Reply from the signal

conditioning instrument

Example:

Enquiry of the control

system

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 31 32

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