ADLP-80

The ADLP-80 was developed by ASEA (ABB) for communication between a SCADA system and RTUs.

Its physical layer uses a specific PCM encoding type consisting of a 4-bit start code and one or more 14 or 19-bit words.

ADLP-80 operates in half-duplex mode following the master/slave principle. A master can communicate with up to 15 RTUs, an RTU only responds to an explicit request from the master.

ISO/OSI Model

7 Application Layer ADLP-80 Application Layer
6 Presentation Layer n/a
5 Session Layer n/a
4 Transport Layer n/a
3 Network Layer n/a
2 Link Layer n/a
1 Physical Layer PCM
RS232 (V.24)

Supported Information Types

Control Direction
  • Double Command
  • Setpoint BCD [3 decades]
Monitoring Direction
  • Single indication [1 Bit]
  • Double indication [2 bit]
  • Single indication [1 Bit] with time tag
  • Double indication [2 bit] with time tag
  • Measured value [11 bit]
  • Counter value [12 bit]

Protocol Features

  • Physical Layer

    proprietary PCM encoding, half-duplex

  • Application Layer

    on-demand transmission of digital, analog and counter values
    on-demand transmission of digital and analog values on change
    transmission of digital indications with time tag (events recording message)
    Direct transmission of commands and setpoints
    "Select before operate" transmission of commands and setpoints
    Clock synchronization

  • Address Space

    RTU addresses 1..15
    up to 59 groups with up to 16 digitals each
    up to 31 groups with up to 8 analogs each

Implemented Protocol Stacks

ADLP-80, Slave

Applicable Products

  • ipConv
    ipConv

    Universal protocol converter for highest degree of flexibility

References

  • Interconnection Libya-Tunisia
    Interconnection Libya-Tunisia, Libya/Tunisia

    Products: ipConv
    Protocol Stacks: ADLP-80, Slave IEC 60870-5-101, Master