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IEC 60870-5-104 Slave | Supported Features and Limitations

Supported Features

  • Supports TCP protocol
  • Supported IEC 60870-5-104 commands:
    • General interrogation
    • Specific group interrogation
    • Single point write
    • Double point write
    • Regulating step write
    • Bitstring write
    • Normalized measurand (with or without time tag) write
    • Scaled measurand (with or without time tag)  write
    • Floating point measurand (with or without time tag) write
    • Clock synchronization
  • Supports IEC 60870-5-104 point control mode:
    • Select/Execute
    • Select only
    • Execute only
  • Support multiple slave
  • Each slave can have its own IP address (IP aliasing feature)
  • Each point input can be initialized by the user
  • Each point can be attached to a specific interrogation group or to the cyclic group
  • Event scan can be enabled for each data types to trigger spontaneous data report to the master
  • Each analog point has a configurable low limit, high limit and deadband
  • Configurable event scan rate
  • Configurable maximum number of buffered of event for each data types
  • Configurable cause of transmission (COT) size (1 or 2 octets)

Limitations

  • It operates asynchronously from the model simulation step. It will try to send and receive data as fast as possible. A dedicated core can be used to improve performance.
  • The event scan rate is a global parameter for the entire database. It will be the same of all types of data.
  • Only TCP communication is supported.
  • Each configured slave must have a unique ASDU address.
  • RMS computation is only available for floating point outputs.

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