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ADLP-80 ISO/OSI Model
Supported Information Types
Protocol Features
Implemented Protocol Stacks
Applicable Products
References
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
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| 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
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| 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
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Implemented Protocol Stacks
Applicable Products
 | ipConv | Universal protocol converter for highest degree of flexibility
Details...
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References
 | Interconnection Libya-Tunisia
Details...
| Libya/Tunisia | ipConv | ADLP-80, Slave / IEC 60870-5-101, Master / |
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