Rockwell Automation 2706-LV2P_LV2R_LV4P_LV4R DL40 PLUS USER MANUAL - Manual (Page 19)

Overview of the DL40 Plus 1–9
Publication 2706-6.1
Keyboard Port
Use the Keyboard port on the DL40 Plus to:
•
edit options, messages, communication port settings
•
input ASCII data to a host controller, PLC, or computer
•
trigger messages using Open protocol (ASCII triggering)
Debug Mode (Parallel Port Version)
Use Debug mode to display the binary status (1 or 0 value) of the
data lines and the state of the strobe lines. This mode is useful for
checking the output of a programmable controller.
Auxiliary Devices
Connect a variety of useful auxiliary devices to the DL40 Plus
display.
Slave Displays
Address up to 126 DL40 Plus or DL50 slave displays over an
RS-485 network at distances up to 4,000 feet (1200 m) from the
originating DL40 Plus. You can also control the annunciation relay
on remote DL40 Plus or DL50 Series slave displays. By assigning a
specific address to each slave display, you can control which slaves
receive and display a given message.
Printers
Connect a serial printer to print the Historical Events Stack or a
listing of the internal application file. The time and date a message
was triggered can be included on the stack printout. You can also set
message attributes such as sending triggered messages to a printer
through the RS-232 port.
Alarms
The alarm relay activates or deactivates an external remote alarm or
warning light. Individual message attributes can be set to energize or
de-energize the alarm relay contacts on DL40 Plus or slave displays.
!
ATTENTION: Use the DL40 Plus alarm relay for
annunciation purposes only. Do not use the alarm relay
for control applications.