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SEAB 1W ISO/OSI Model
Supported Information Types
Protocol Features
Applicable Products
The SEAB 1W protocol (also referred to as Modnet 1W) developed by AEG is
primarily based on the widely known IEC 870-5 standard (see also
IEC 60870-5-101) using the FT1.2 format class for the link layer. It supports unbalanced data transmission (master/slave principle) and enables the coupling
of several substations to a single line.
Only a small part of the full range of functions supplied by the IEC was
implemented, and previously varying parameters, such as the number of address bytes,
have now been clearly specified for the first time. Minor changes
were made, for instance in the way time stamps are encoded.
ISO/OSI Model
| 7 |
Application Layer |
Seab1N 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 |
FT 1.2 as specified in IEC 60870-5-1 | | 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 [11 bit] | | Counter value [16 bit] |
Protocol Features
| Physical Layer |
RS232 / V.24 (UART-Conform), Half-Duplex
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| Link Layer |
Unbalanced transmission: Party Line or Point to Point connections
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| Application Layer |
Transmission of pulse commands
Transmission of setpoints
Spontaneous transmission of indications with or without time tag, measurands, counters, ...
Requested transmission of indications, measurands, counters, ...
General Interrogation
User defined services
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| Address Space |
Physical address: 0..255
Logical adddress: 1..65535
Information object address: 1..65535
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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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