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Hitachi HC4300 ISO/OSI Model
Supported Information Types
Protocol Features
Implemented Protocol Stacks
Applicable Products
References
The Hitachi HC4300 protocol was developed by HITACHI company for communication
between control stations and substations.
The physical layer is based on a SDLC standard format.
Hitachi HC4300 operates in half-duplex mode based on the master/slave principle.
While one master can communicate with up to 15 RTUs, each RTU only responds to
explicit requests from the master.
ISO/OSI Model
| 7 |
Application Layer |
HITACHI HC4300 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 |
SDLC framing
RS232 (V.24) |
Supported Information Types
| Control Direction |
Double Command | | Monitoring Direction |
Single indication [1 Bit] | | Single indication [1 Bit] with time tag | | Measured value [12 bit] | | Counter value [16 bit] |
Protocol Features
| Physical Layer |
PCM, half-duplex, SDLC frame format/synchronisation
Baud rates up to 2400 |
| Application Layer |
on-demand transmission of analog and counter values
on-demand transmission and transmission on change of single point indications
transmission of single point indications with time tag
"Select before operate" transmission of commands
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| Address Space |
RTU addresses 1..15
binary indications: 3 groups with 16 words each. Each word contains 16 bit.
Measured values: 8 groups with 16 measured values each
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Implemented Protocol Stacks
Applicable Products
 | 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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 | ipConv | Universal protocol converter for highest degree of flexibility
Details...
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References
 | ABBHTC
Details...
| Iran | ipConv | HITACHI HC4300, Slave / IEC 60870-5-101, Master / |
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