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Rockwell Automation Publication 1766-UM001O-EN-P - September 2021
65
Chapter 4 Communication Connections
Connect to a RS-485
Network
The network diagrams on the next pages provide examples of how to connect
MicroLogix 1400 controllers to the RS-485 network.
You can connect a MicroLogix 1400 controller to your RS-485 network directly
without using an external optical isolator, such as Advanced Interface
Converter (AIC+), catalog number 1761-NET-AIC, as shown in the illustrations
below, because Channel 0 is isolated within the controller.
MicroLogix 1400 controllers support various protocols on the RS-485 network,
including DH-485, DF1 Half-Duplex Master/Slave, Modbus RTU Master/Slave,
ASCII and DNP3 slave protocols. In this section, DH-485 protocol is used as an
example. Any physical connection should be the same as other protocols.
DH-485 Configuration Parameters
When MicroLogix communications are configured for DH-485, the following
parameters can be changed:
See
Software Considerations on page 181
for tips on setting the parameters
listed in
Use a 1763-NC01 Series A or later (8-pin mini-DIN to 6-pin RS-485 connector) cable or
equivalent to connect a MicroLogix 1400 controller to a RS-485 network.
Table 9 - DH-485 Configuration Parameters
Parameter
Options
Baud Rate
9600, 19.2 Kbps
Node Address
1...31 decimal
Token Hold Factor
1...4
A
TERM
B
COM
SHLD
CHS GND
Содержание 1766-L32AWA
Страница 10: ...10 Rockwell Automation Publication 1766 UM001O EN P September 2021 Table of Contents Notes ...
Страница 18: ...18 Rockwell Automation Publication 1766 UM001O EN P September 2021 Chapter 1 Hardware Overview Notes ...
Страница 56: ...56 Rockwell Automation Publication 1766 UM001O EN P September 2021 Chapter 3 Wire Your Controller Notes ...
Страница 122: ...122 Rockwell Automation Publication 1766 UM001O EN P September 2021 Chapter 5 LCD and Keypad Notes ...
Страница 152: ...152 Rockwell Automation Publication 1766 UM001O EN P September 2021 Appendix B Replacement Parts Notes ...
Страница 160: ...160 Rockwell Automation Publication 1766 UM001O EN P September 2021 Appendix C Troubleshoot Your System Notes ...
Страница 302: ...302 Rockwell Automation Publication 1766 UM001O EN P September 2021 Glossary Notes ...
Страница 308: ...308 Rockwell Automation Publication 1766 UM001O EN P September 2021 Index Notes ...