Siemens SIMATIC TIWAY 1 Manual de usuario descargar pdf (Pagina 181)

USING THE NON-INTELLIGENT TERMINAL PROTOCOL

UNILINK HOST

ADAPTERA–5

USER MANUAL

Then insert the character count at the beginning of the message body as

“00182001000202000E”.

The ECC is given by:

Two’

s complement

of (0018 + 2001 + 0002 + 0200 + 0E00) = CFE5 (ECC)

Fill Characters

so that the complete message is the character string:

:00182001000202000ECFE5;

or:

30 30 31 38 32 30 30 31 30 30 30 32 30 32 30 30 30 45 43 46 45 35 3B

: 0 0 1 8 2 0 0 1 0 0 0 2 0 2 0 0 0 E C F E 5 ;

ASCII

CODES

CHARACTERS

The following table summarizes the NITP message structure:

Table A–2 NITP Message Structure

Field Contents No. of Characters

Beginning Delimiter Colon (:) 1

Character Count Hexadecimal 4

Body of Message Hexadecimal 580 (max.)

Error Checking Code Hexadecimal 4

Terminator Semicolon (;) 1

________

Total 590

1 2 ... 176 177 178 179 180 181 182 183 184 185 186 ... 207 208

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Siemens SIMATIC TIWAY 1 Manual de usuario Pagina 181