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ADLP-80

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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

ipConvipConvUniversal protocol converter for highest degree of flexibility
Details...
product/ipConv/en/ipConv_en.pdf

References

Interconnection Libya-TunisiaInterconnection Libya-Tunisia
Details...
Libya/TunisiaipConv ADLP-80, Slave / IEC 60870-5-101, Master /
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