Endpoint URIs

  • URI Syntax

Reading Modbus Data

Project Documentation

Jamod Component URIs

URI Format

 jamod:<protocol>://<host>[:port]/<dataType>/<referenceAddress>[?options]

Protocols

ProtocolDescription
tcpUses the TCP/IP transport
udpUses the UDP transport. Note: This is not an official Modbus specification. It is a proof of concept offered by the authors of Jamod.

Data Types

Data TypeRead/WriteDescription
discreteInputsRead-OnlyDiscrete inputs
coilsRead-WriteDiscrete outputs or coils
inputRegistersRead-OnlyInput registers, where each register holds a 16-bit word.
registersRead-WriteHolding registers, where each register a 16-bit word.

Reference Address

The reference address is the address offset of the first discrete input, coil, or register to be accessed.

Options

PropertyDefaultDescription
count0The number of discrete inputs to read. This determines the size of the BitVector
initialDelay500The delay (in milliseconds) between when the endpoint is started and when the first polling occurs
delay500The Modbus polling interval (in milliseconds)