Rockwell Automation 2706 DL40 HARDWARE USER MANUAL - Manual (Page 78)

Chapter
8
Chapter 8
Serial Communications
Figure 8Table 8
8 – 1
Chapter 7
Serial Communications
This chapter explains the use of the three serial communication ports on the
DL40.
Note: The Remote I/O Port is described in Chapter 10. Wiring and cabling
instructions appear in Chapter 11.
Serial communications with the DL40 are made via three ports located on the
back panel of the DL40:
•
the RS-232 Port
•
the RS-485 Port
•
the Keyboard Port
Each port can be used to perform a different set of tasks. A summary of
potential uses for each port appears below. You can use the RS-232 Port for:
Uses of the RS-232 Port
•
Direct (point to point) uploading or downloading of message files up to
50 feet (15.24 m.). Refer to the Dataliner DL40 Series Message Display
Offline Programming Software User Manual (Publication 2706-808) for
information.
•
Reading or writing a DL40’s Internal Application Memory from or to a
tape.
•
Printing the Historical Events Stack.
•
Printing messages as they are triggered for display (if the Print Message
attribute is set).
•
Printing user application file (parameters and messages).
•
Test displaying messages.
•
Setting DL40 using computer’s real time clock.
Uses of the RS-485 Port
•
Multi-drop uploading and downloading of message files.
•
Communicating to a slave message display.
Note: To send messages to a slave, Port Use of the RS-485 Port must be
set to DL Slave .
Chapter Objectives
Introduction
Port Usage