![]() Modbus parser (opens new window): tool to parse Modbus requests and responses.(opens new window): tool to convert numbers between different binary presentations.Simplymodbus.ca (opens new window): good reference as well as excellent tutorial like explanation of the protocol.Wikipedia article (opens new window): good read on modbus basics and addressing.Reader of the documentation should understand the basics of Modbus protocol. The binding does support Modbus RTU over Modbus TCP, (also known as "Modbus over TCP/IP" or "Modbus over TCP" or "Modbus RTU/IP"), as well as normal "Modbus TCP".The binding does not act as Modbus slave (e.g. ![]() Please note the following caveats or limitations The binding can also write data to Modbus slaves using FC05 (Write single coil), FC06 (Write single holding register), FC15 (Write multiple coils) or FC16 (Write multiple holding registers). This polled data is converted to data suitable for use in openHAB.įunctionality exists to interpret typical number formats (e.g. ![]() The binding polls (or reads) Modbus data using function codes (FC) FC01 (Read coils), FC02 (Read discrete inputs), FC03 (Read multiple holding registers) or FC04 (Read input registers).
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