Protocol : Siemens - SIMATIC N


 

Parameterization :

CDE adapter :

Modulation mode :

Baud rate :

Hammingdistance  t /r:

Tolerance limit :

Modulation ratio :

Message gap :

PC-TxT-level :

Telegrammtypes :
   
 
 
   
   

switch setting PDM

Digital-pulse-duration-modulation

50 - 1200 baud

2

0 - 50%

2.2 ( variable )

6.6 ( variable )

+12V / -12V

Command ( 19 bits )
Quick check ( 1 bit )
Message ( 31 bits )
Message ( 35 bits )
Measurand  ( 31 bits )
Measurand ( 35 bits )

LIAN / SIMO - Operation mode

A distinction of directions is not necessary because the telegram type can be identified clearly. That means that there is no difference in parameterization whether recording in monitoring or control direction.

Telegram structure

MSB_FIRST is transmitted.

Abbreviations:
ST :
  

PY :

IZn :

SI :

start character   ( = 1 ) is sent before and is not registered in the telegramm-buffer (TDB).

Parity bit ( long pauses supplemented on even )

Indication bits

Final pulse ( = 1 )

Transmission errors :

*F:Blocklength : The telegram length is incorrect
*F:Parity : Faulty parity bit
*F:TimeTolerance : The measured character length is beyond the tolerance set in LIAN.
*F:Spike :   The length of a received sign is < 20% of the length of a short pulse
*F:2out of 5-Code : The Address-code (2 out of 5 ) is incorrect (command).
*F:2out of 8-Code : The Address-code (2 out of 8 ) is incorrect (command).
*F:2out of 8-Code : The Address-code (2 out of 8 ) is incorrect.
 *F:2out of 9-Code : The Address-code (2 out of 9 ) is incorrect.

 


MAYR Software

Wuerzburger Ring 39,  D 91056 Erlangen

Manual LIAN DOS


LIAN DOS Protocol Simulator and Analyzer
© Copyright 1991, 1996, 2001, 2006-2010 by Werner Mayr. All Rights reserved.