Protocol : SIEMENS - FW535


 

Parameterization :

CDE adapter :

Modulation mode :

Transmission rates :

Hamming distance :

Tolerance limit :

Modulation ratio :

Message gap :

PC-TxT level :

switch setting  PDM

Digital-pulse-duration-modulation

25 - 2400 baud

2

0 - 50%

2.2 / 3.0

5.6 ( variable )

+12V / -12V

Telegram structure

Transmission is MSB_FIRST

Information types

Telegrams in control- and monitoring direction can be distinguished by their length ; With the help of organization signs one can recognize general check , commands , messages and measurands

Further telegram types are characterized through different addresses. Since there exists no generally valid table for it however, in the program LIAN a list to the type identification must be created over menu item Setting | Information type or be loaded over File | Load | INFtyp.

command direction :  FW 535 requires no description in control direction
Monitoring direction :
type 09 = TDB_F535_EM1
type 10 = TDB_F535_DM1 
type 11 = TDB_F535_MW7
type 12 = TDB_F535_MW8 
type 13 = TDB_F535_ZW1 
type 14 = TDB_F535_ZW2 
single point information
double point information
VZ measurements 7 bit + VZ
measurements 8 bit
counter type 1
counter type 2

Bit shifter

In SIMO you can activate a bit shifter via the command "bs". It enables you to set a bit conveniently into the information block of the relevant telegram. When exceeding the information area the message address is automatically increased or reduced.

In the window "bit shifter" you can use the following command :
[ 1-9 ] define interval n
[ arrow-right ] n bit to the right
[ arrow-left ] n bit to the left
[ arrow-up ] increase message address by 1
[ arrow-down ] reduce message address by 1
[ E ] toggle control "on" ( BE bit ). Control "off" is automatically set or cleared.
[ A ] toggle control "off" ( BA bit ). Control "on" is unchanged.
[ S ] send message
[ ESC ] quit entry mask

It should be taken into account that the bit shifter doesn't change the message address and the information block ; previous settings are not lost. Furthermore its application is not useful with all message types ( only indications and fleetings ). Short message are not processed.

Transmission errors

*F:Blocklength :  The telegram length is incorrect.
*F:Hamming code :   The check code is wrong.
*F:Time tolerance : The measured character length is beyond the tolerance set SIMO.
*F:Spike : The received sign is smaller than 20% of the short pulse.
*F:2 out of 5-code : The address code ( 2 out of 5 ) is faulty ( command ).
 *F:Org-Sign : The BE-bit is equal to the BA-bit ( command ).
With the general - interrogation , one gives up the two last error checks.

 


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.