Rockwell Automation 2706-LV2P_LV2R_LV4P_LV4R DL40 PLUS USER MANUAL - Manual (Page 69)

Chapter
6
Serial Port Communications
This chapter discusses the serial communication ports and the
runtime serial protocols used to communicate with the DL40 Plus.
Section Page
Overview of the Serial Ports 6–1
Using the RS-232 Port 6–2
Using the RS-485 Port 6–3
Using the Keyboard Port 6–4
Triggering Messages Using Open Protocol 6–5
Sending Binary/BCD Variables Using Open Protocol 6–9
Sending ASCII/BCD Variables Using Open Protocol 6–10
Sending ASCII Data from the Keyboard Port 6–11
Returning ASCII Data from the RS-232/RS-485 Ports 6–12
The back panel of the DL40 Plus has 3 serial communication ports:
•
RS-232 Port
•
RS-485 Port
•
Keyboard Port
Each port can perform a different set of tasks. To perform these
tasks, you will have to modify the port settings through the Ports
menu in the Offline Programmer or the Onboard Editor.
From the Port Use submenu, you can configure the RS-232 and
RS-485 ports for the following types of communications:
•
Programmer
•
DL Slave
•
Open Protocol
Open Protocol and DL Slave operation are available on either the
RS-232 or the RS-485 port, but not both. If you configure one these
ports for Open Protocol, you will not be able to select Open Protocol
for the other port.
The Onboard Editor and Offline Programming Software will display
an error message if you try to configure a port with a protocol that is
assigned to another port.
Chapter Objectives
Overview of the Serial Ports