Vega Modbus-TCP, ASCII protocol Manual do Utilizador descarregar pdf (Página 18)

2 ASCII protocol

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

30768-EN-130701

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)

•

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

Total length of the telegram: N*14 characters

Note:

The % sign is a separator, not the unit %

Enquiry:

Answer:

=001# 000673%

=002# 008246%

=003#-000673%

=004#-008246%

& 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 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

End identication 1 CR

•

Identier: "&" (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 identication: 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 5 … 6 -000673

Example:

Enquiry of the control

system

Reply from the signal

conditioning instrument

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 31 32

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