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SEAB 1F ISO/OSI Model
Supported Information Types
Protocol Features
Implemented Protocol Stacks
Applicable Products
References
The Seab 1F protocol (also known as Modnet 1F) developed by AEG enables the
coupling of control station and substation belonging to the Geadat 120 product
line. Seab simply refers to the expression 'serial installation bus' which also
describes a possible topology of this protocol based on half-duplex operation.
In other words, up to 128 substations can be operated by one
control station in party line mode.
Also worth mentioning with respect to Seab 1F is that handshake signals
normally employed in modem control are used to implement end of telegram recognition. These signals have to be controlled actively by the
respective transmitting station, which demands highly accurate timing of these
signals during communication.
But the physical connection can still be realized via a normal RS232/V.24
interface, either directly or via a special designated AEG modem connection of
the UEM201 type. This means that data can be exchanged via the
telecommunications network, if the required automatic calling modules have been installed.
ISO/OSI Model
| 7 |
Application Layer |
Seab1F 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 |
RS232 / V.24 (UART-Conform) |
Supported Information Types
| Control Direction |
Single Command | | Setpoint [16 bit] | | Monitoring Direction |
Single indication [1 Bit] | | Single indication [1 Bit] with time tag | | Measured value [8 bit] | | Measured value [16 bit] | | Counter value [16 bit] |
Protocol Features
| Physical Layer |
RS232 / V.24 (UART-Conform), Half-Duplex
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| Application Layer |
Transmission of pulse commands
Transmission of setpoints
Spontaneous transmission of indications with or without time tag, measurands and counter values
Absolute time tag representation, accuracy 1 ms
Support of 8-Bit and 16-Bit measured values
General Interrogation
Request of given Indications, Measurands or Counters is possible
Transmission of management- and organizational data
up to 128 RTUs on a serial line
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| Address Space |
rtu's per line: 128
Indications for each rtu: up to 1024
Measurands for each rtu: up to 64
Counters for each rtu: 64
Commands for each rtu: 256
Setpoints for each rtu: 64
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Implemented Protocol Stacks
Applicable Products
 | ipConv | Universal protocol converter for highest degree of flexibility
Details...
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 | ipConvLite | inexpensive protocol converter for standardized application
start price 2.500,- €
Details...
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 | ipConvPS | Universal protocol converter with integrated Profibus-DP, Slave interface
Details...
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| ipConvPM | Universal protocol converter with integrated Profibus-DP, Master interface
Details...
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References
 | Mainova Communication Hub
Details...
| Germany | ipConv | OPC DAXML 1.01 Server / IEC 60870-5-104, Slave / IEC 60870-5-101, Master / Modbus, Master / SEAB 1F, Master / |
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