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Software - Programming
The library MODBUS_UDP.lib was implemented for the IEC 61131-3 programming system CoDeSys.
The library implements the functions FC1 Read Coil Status; FC3 Read Holding Registers; FC15 Force Multiple Coils (Write Coils); FC16 Preset Multiple Registers (Write Multiple Registers); FC11 Fetch Comm Event Counter. All other functions of the protocol specification were not implemented in this version of the library. The Modbus library is based on the libraries SysLibSockets (TCP/UDP-connections) and the SysLibCallbacks (system calls). Both are delivered along with a 3S runtime system (e.g. SoftPLC).
See attached spec. sheet.
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