Vega Modbus-TCP, ASCII protocol Bedienungsanleitung PDF herunterladen (Seite 21)

2 ASCII protocol

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

30768-EN-130701

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Start: No. of the requested PC/DCS output (1 … 3 characters)

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End identication: 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 7 -000673

T3 1 #

Unit 0 … n xxx

End identication 1 CR

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T1: "=" (1 character)

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DCS no.: No. of the PC/DCS output as 3-digit decimal number

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T2: "#" (1 character)

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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

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T3: "#" (1 character)

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Unit: Unit as text (0 … n unit)

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

Total length of the telegram: 14 characters+Unit character

Enquiry:

?001

Answer:

=001# 000673#%

? Block enquiry

All assigned PC/DCS values in the instrument are delivered as reply

to the block enquiry. The measured value is transmitted with six deci-

mal places without decimal point and with unit.

Number of bytes Character

Identier 1 ?

End identication 1 CR

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Identier: "?" (1 character)

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

Total length of the telegram: 2 characters

Reply from the signal

conditioning instrument

Example:

Enquiry of the control

system

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 ... 31 32

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