PLC profiles

Each profile selects the command family and device-layout assumptions used by the serial MC Protocol codecs.

Choose one explicit profile in your application or configuration UI. The library intentionally does not infer it from ReadTypeName, CPU model text, or omitted configuration.

Profiles

Canonical profile	Hardware	API selector	Notes
melsec:iq-r	MELSEC iQ-R serial modules	PlcProfile::MelsecIqR	iQ-R command and device-layout profile.
melsec:iq-l	MELSEC iQ-L serial modules	PlcProfile::MelsecIqL	Separate public profile for iQ-L targets.
melsec:q-l	MELSEC-Q / MELSEC-L serial modules	PlcProfile::MelsecQL	Used by the host quickstart examples.
melsec:qna	MELSEC QnA-compatible targets	PlcProfile::MelsecQnA	Enables QnA command-family selection.
melsec:ana-anu	MELSEC AnA / AnU-compatible targets	PlcProfile::MelsecAnAAnU	Enables AnA/AnU command-family selection.
melsec:a	MELSEC-A-compatible targets	PlcProfile::MelsecA	Enables A-series command-family selection.

How to select

auto protocol = mcprotocol::serial::highlevel::make_c4_binary_protocol(
    mcprotocol::serial::PlcProfile::MelsecQL);

Or assign the field directly when you build a custom ProtocolConfig:

mcprotocol::serial::ProtocolConfig protocol {};
protocol.plc_profile = mcprotocol::serial::PlcProfile::MelsecQL;

PlcProfile::Unspecified is a configuration error. It is useful only as the default internal value before your application selects a real profile.

Profile-specific cautions

Canonical profile	Caution
melsec:iq-r	Use for iQ-R serial-module routes. Some native command behavior remains target-dependent.
melsec:iq-l	Kept separate from iQ-R so iQ-L behavior can diverge later without changing saved configuration names.
melsec:q-l	Use for MELSEC-Q and MELSEC-L serial paths that use the Q/L command-family assumptions.
melsec:qna	Select only when the target should use QnA-style command selection.
melsec:ana-anu	Select only when the target should use AnA/AnU command-family selection.
melsec:a	Select for A-series-compatible targets; extended file-register ER/EW commands require this profile.

The profile does not replace serial settings. Baud rate, parity, stop bits, frame type, sum-check behavior, and station number still have to match the PLC serial module.