Publication 1747-UM005B-EN-P - March 2006
Module Configuration Using the Backplane
6-13
DH-485 Port Setup Parameters
Build the Modem Init String
Configuration Packets
When the module is powered up for the first time, the Modem Init
String is empty. You can build the string using the two Data ID
numbers reserved for the Modem Init String.
The packet with Data ID 4 will set up the first 14 characters of the
Modem Init String. If you require less than 14 characters, place a NULL
in the location immediately following the last valid character. The
module ignores all characters beyond the NULL value. If you require
exactly 14 characters, the module automatically places a NULL after
the 14th character.
If you need more than 14 characters, you also need to send the packet
with Data ID 5. Send this packet only
after
you send the packet with
Data ID 4. Here again you need to place a NULL immediately
following the last valid character. If you use all available characters of
the string, a NULL is automatically placed after the 28th character.
Parameter
Default
Options
Description
Node Address
2
0...31 (decimal)
The address of this node on the DH-485 network. Every
device on the DH-485 network must be given a unique node
address. For optimum performance, set devices to
consecutive addresses starting at 0. This minimizes the
solicitation of new stations.
Max. Node Address
31
1...31 (decimal)
The number of nodes that will be polled. For optimum
performance this value should be set no larger than the
value of the highest numbered node on the network.
Message Timeout
10,000 ms
100...12,750 ms
The time to wait for a response to a message sent on a
DH-485 network.
Pass Through
Disabled
0=Disabled,
1=Enabled
Determines whether diagnostic commands are executed by
the module (Disabled) or passed through to the host
(Enabled).
Communication Rate
19200
0=300, 1=600,
2=1200, 3=2400,
4=4800, 5=9600,
6 and 7=19200
The speed in bits per second at which data is transferred
on the DH-485 link.
Important: All stations on the DH-485 link must be set to
the same communication rate.
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: ......