Rockwell Automation 2706-F11J_F11JC_F21J_F21JC DL50 INSTALLATION MANUAL - Manual (Page 41)

Chapter 4
Installing the DL50
4–16
As previously described, a DL50 display can be connected to the RS-232 or
RS-422 port of a DL20 display or the RS-485 port of a DL40 display
(Master). When this type of configuration is used, all messages are stored in
the Master DL20/DL40 displays. All the host controller is required to do is
trigger a particular message stored in the Master DL20/DL40 display.
Up to 32 DL50 slave displays can be connected (without line drivers) to the
RS-485 port of the DL40 or RS-422 port of the DL20. When particular
messages are created, they can be assigned an attribute which designates that
messages be displayed on a particularly addressed slave DL50 display, all
slave DL50 displays, or just the host DL40/DL20 display. Addresses are
assigned to Slave DL50 displays by setting DIP Switches as described in
Chapter 3 of this manual.
The DL40 (Firmware V. 3.00 or later) supports control of the DL50 relay,
and control of the display color in tri-color displays, on a per-message basis.
These controllable DL50 features are accessed and configured using the
message attribute selections within the DL40 Offline Programmer software
(2706-ND1 Series D or later).
Note: Whatever is sent out of the DL20’s RS-422 port is also sent out the
RS-232 port, and vice versa.
For more information on DL20 displays (Master) refer to DL20 display
User’s Manual Publication 2706-801.
Figure 4.13 illustrates possible DL20 and DL40 Master/Slave configurations:
Figure 4.13
DL20/DL40 Master/Slave Configurations
Host Programmable Controller
or Computer
Host Programmable Controller
or Computer
DL40 DISPLAY
MASTER
All Messages
Are Stored Here
DL50 DISPLAY
DL50 DISPLAY
RS-485
1771 Remote I/O or
Parallel I/O
DL20 DISPLAY
MASTER
All Messages
Are Stored Here
DL50 DISPLAY
RS-232
Parallel I/O Interface
RS-422
or
DL50 DISPLAY DL50 DISPLAY
RS-485 (RxD) RS-485 (RxD)
To Other DL50 Displays
To Other DL50 Displays
Connection to DL20/DL40
“Master” Displays