ModbusTCPTransport#

class ModbusTCPTransport(host: str, port: int = 502, timeout: float = 3.0)[source]#

A Modbus TCP line. One socket, addressed per wire op via unit_id.

Validate and store host, port, and timeout.

Attributes

Whether the client has been opened and not closed.

Methods

`check_unit_id`	Validate `unit_id` against this physical layer's range (0 to `_max_unit_id`) and return it.
`close`	Close and teardown; with a holder, remove it and tear down only when the last owner leaves.
`lock`	Return the reentrant resource lock for atomic multi-step sequences; the holder may write/query/read inside it.
`open`	Open the connection (idempotent); with a holder, admit it and return True only for the first owner.
`read_coils`	Read coils by address (FC01).
`read_discrete_inputs`	Read discrete inputs by address (FC02).
`read_holding_registers`	Read holding registers by address (FC03).
`read_input_registers`	Read input registers by address (FC04).
`read_typed`	Read `address` as `data_type`, dispatching by `register_type` and decoding across registers.
`write_coil`	Write a single coil by address (FC05).
`write_coils`	Write multiple coils by address (FC15).
`write_holding_register`	Write a single holding register by address (FC06).
`write_holding_registers`	Write multiple holding registers by address (FC16).
`write_typed`	Encode `value` as `data_type` and write it to `address`, dispatching by `register_type`.