Glossary term
Function Code
industrielBasics
Also known as
function codesModbus function codeFC Modbus
Definition
One-byte field in the Modbus PDU identifying the action requested by the master: read coils (01), read registers (03), write (06/16), etc. A code > 0x7F in the response signals an exception.
Questions using this term
- Which Modbus function code is used to READ the Holding Registers (16-bit read/write registers) of a slave?4. Function codes · Lesen Coils/Register
- Function 0x06 "Write Single Register" writes a single 16-bit Holding Register on a Modbus slave, with both the address and the value encoded on 16 bits each in the request.4. Function codes · Write Single Register (0x06)
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