Inhalt
1
Hardware .....................................................................................................................................3
1.1
Modbus / RS485 Standard ......................................................................................................... 3
1.2
Elektrischer Anschluss ............................................................................................................... 3
1.3
Bus-Topologie............................................................................................................................. 3
1.4
Systemanforderungen ................................................................................................................ 3
2
Software .......................................................................................................................................4
2.1
Codierung ................................................................................................................................... 4
2.2
Bus-Timing .................................................................................................................................. 4
2.3
2.4
Adressierung............................................................................................................................... 5
2.5
Funktionscodes .......................................................................................................................... 5
2.6
Daten .......................................................................................................................................... 5
2.7
2.8
Fehlerbehandlung ....................................................................................................................... 6
2.9
Funktionscode-Beispiele ............................................................................................................ 7
3.
Adressraum .................................................................................................................................9
3.1
Adressübersicht .......................................................................................................................... 9
3.2
Variablentypen .......................................................................................................................... 10
3.3
Formattypen.............................................................................................................................. 10
3.3.5 Format Typ 5 (THD)............................................................................................................... 11
4
Variablen im Adressraum ....................................................................................................... 17
4.1
4.2
5
6
Anwendungshinweise ............................................................................................................. 31
6.1
6.2
6.3
Betriebslogbuch ........................................................................................................................ 31
6.4
Stichtagszähler ........................................................................................................................ 32
6.5
Rücksetzbarer Zähler .............................................................................................................. 32
7
Produktsupport ........................................................................................................................ 32
2
Berg GmbH