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Publication 1747-UM005B-EN-P - March 2006
Chapter
3
Communicate with the Interface Module
This chapter explains:
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full- and half-duplex DF1 communication.
•
local and remote half-duplex operation.
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communicating with master and slave DH-485 devices.
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communicating with a modem.
DF1 Communication
The module supports full-duplex DF1 protocol and half-duplex DF1
slave protocol on its RS-232 connection to the host computer (using
the DF1 Port). The details of these protocols can be found in the DF1
Protocol and Command Set Reference Manual, publication
1770-RM516.
Full-duplex DF1 Protocol
Full-duplex DF1 protocol is provided for applications where high
performance peer-to-peer communication is needed.
In full-duplex mode, the module can send embedded responses. If the
embedded response detect option is set to auto-detect embedded
response, the module will not send embedded responses until it
receives one from the host. The module makes an assumption that if a
host computer sends embedded responses, it can also receive them.
In full-duplex mode, the destination address in a packet sent from the
host computer to the module is the address of the DH-485 node for
which the packet is intended. The source address in packets received
by the host computer from the module is the node address of the
sender.
Summary of Contents for 1747-KE
Page 1: ...DH 485 RS 232C Interface Module Catalog Number 1747 KE User Manual AB Parts ...
Page 4: ...Publication 1747 UM005B EN P March 2006 2 Summary of Changes Notes ...
Page 12: ...Publication 1747 UM005B EN P March 2006 4 Preface ...
Page 26: ...Publication 1747 UM005B EN P March 2006 2 4 Quick Start ...
Page 88: ...Publication 1747 UM005B EN P March 2006 7 4 Interpret the LED Indicators ...
Page 116: ...Publication 1747 UM005B EN P March 2006 8 28 Application Examples ...
Page 120: ...Publication 1747 UM005B EN P March 2006 A 4 Specifications ...
Page 130: ...Publication 1747 UM005B EN P March 2006 C 6 Lithium Battery Replacement Handling and Disposal ...
Page 134: ...Publication 1747 UM005B EN P March 2006 D 4 Interface Module Configuration Worksheets ...
Page 138: ......