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SEAB 1F

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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
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
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

Implemented Protocol Stacks

SEAB 1F, MasterSEAB 1F, Slave

Applicable Products

ipConvipConvUniversal protocol converter for highest degree of flexibility
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product/ipConv/en/ipConv_en.pdf
ipConvLiteipConvLiteinexpensive protocol converter for standardized application
start price 1.800,- €
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product/ipConvLite/en/ipConvLite_EN.pdf
ipConvPBSipConvPBSUniversal protocol converter with integrated PROFIBUS-DP, slave interface
Details...
ipConvPBMipConvPBMUniversal protocol converter with integrated PROFIBUS-DP, master interface
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ipConvPNMipConvPNMUniversal protocol converter with integrated PROFINET-IO, master interface
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ipConvPNSipConvPNSUniversal protocol converter with integrated PROFINET-IO, slave interface
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References

Mainova Communication HubMainova Communication Hub
Details...
GermanyipConv OPC DAXML 1.01, Server / IEC 60870-5-104, Slave / IEC 60870-5-101, Master / Modbus, Master / SEAB 1F, Master /
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