Automation Communication

SCADA communication protocol

SCADA (Supervisory Control And Data Acquisition) is a system that refers to a combination of telemetry and data acquisition. This consists of gathering information, transferring it back to the control center, carrying out the necessary analysis and control, and then displaying this data on a number of display operators

SCADA protocol:

The Survalent SCADA feature that has been used today includes:

  • Data on logging
  • Historical Event.
  • SMS gateway (down, maneuver by DCC, Communication
  • Fail / Normal, and RTU Fail / Normal).
  • Disaster Recovery.

Communication Protocol for SCADA:

IEC 60870-5-101:

It is a basic protocol developed specifically for regulating the distribution of electric power systems including telecontrol and telesignal capabilities. This protocol is used by the PLN East Java PPE for communication with old type RTUs such as Schneider Quantum and Siemens SICAM.

DNP 3:

It is a data communication protocol designed to be more resistant to distortion and interference with communication. This protocol is used by PLN East Java Regional Budget to connect masters with RTU who support this including Scout, MG Talus, Harris D20.

Modbus:

The basic concept of modbus communication consists of master and slave. Equipment that acts as a slave will continue to standby unless it gets an order from the control center. Every equipment that is connected with the modbus protocol must have a unique address.

A modbus command is equipped with the destination address of the command. Only the destination address will process the order, even though the other equipment may receive the order. Each modbus command has error checking information to ensure data is received without damage.

This protocol has several advantages including:
a. Easy installation, maintenance and repair.
b. Multidrop devices can be done serially

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