Denso Power Net Terminal BHT-7500 Especificações Página 158

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Chapter 8. Files
149
8.4.3 Overview of Communications Protocols
The BHT series supports the three communications protocolsBHT-protocol, BHT-Ir protocol,
and multilink protocol for file transmission, as listed below. Using the
XFILE statement, the
BHT may upload or download a file according to any of these protocols.
BHT-protocol : All BHT series
BHT-Ir protocol : BHT-6000/BHT-6500/BHT-7000/BHT-7500
Multilink protocol : BHT-5000
[ 1 ] BHT-protocol
All BHT series supports the BHT-protocol.
This protocol is used also in System Mode or Easy Pack.
For the communications specifications of the BHT-protocol, refer to the BHT User's Manual.
Primary station and secondary station
The primary station and the secondary station should be defined as below.
When uploading data files
Primary station: BHT
Secondary station: Host computer
When downloading data files
Primary station: Host computer
Secondary station: BHT
Protocol functions
In the BHT-protocol, using the following protocol functions may modify a transmission
header or terminator in a send data:
For a header: SOH$ or STX$
For a terminator: ETX$
Field length that the BHT-protocol can handle
When the BHT-3000/BHT-4000 transmits files according to the BHT-protocol, each field
length should be a maximum of 99 bytes. The BHT-5000/BHT-6000/BHT-6500/BHT-
7000/BHT-7500 may transmit files having the field length of up to 254 bytes.
In file transmission, the host computer should also support the same field length as the
BHT. The MS-DOSbased Transfer Utility supports the field length of up to 99 bytes;
the Windows-based Transfer Utility supports up to 254 bytes.
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