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6.5.3 Uitzonderingscodes
Het Modbus 23 communicatieprotocol heeft vijf
default Modbus uitzonderingscodes voor onjuist
ingevoerde waarden. De tabel hieronder toont de
bijbehorende fouten en stelt de oplossingen voor.
Code Fout Oplossing
01 De functiecode is niet correct Voer de code voor Functie 23 in: 0x17
02 Read Starting Address verkeerd Voer Read Starting Address in: 0
Write Starting Address verkeerd Voer Write Starting Address in: 0 or 1
03 Verkeerde Quantity to Read Voer als Quantity to Read in: 6
Verkeerde Quantity to Write. Voer als Quantity to Write in: 6
04 Pakket te groot of te klein Voer een pakket in dat exact 25 Byte groot is,
inclusief Modbus ID + CRC.
IDAL waarde is te hoog Voer een maximaal 5 bits waarde in.
IDB waarde is te hoog Voer een maximaal 18 bits waarde in.
05 Als er drie seconden lang geen antwoord
van MasterBus komt, treedt de fout Time
out op.
Controleer of het MasterBus voedend apparaat werkt en/ of
controleer de MasterBuskabels.
6.5.4 Uitzonderingsboodschap
Hieronder wordt de uitzonderingsboodschap gedefinieerd en een voorbeeld gegeven.
Uitzonderingsboodschap
Variabele Grootte Waarde
Bus address 1 Byte Variabel
Function code 1 Byte 0x97 (Vast)
Exception code 1 Byte Variabel
CRC 2 Byte Berekend
Voorbeeld uitzonderingsboodschap
Variabele Waarde Bereik
Bus address 0x01 [1..247]
Function code 0x97 (Vast)
Exception code 0x05 [1..5]
CRC Lo 0x8E [0..255]
CRC Hi 0x33 [0..255]
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Email : info@mastervolt.com
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