Rockwell Automation 2706-M1 MESSAGEVIEW 421 HARDWARE MANUAL - Manual (Page 73)

4–13 Running Applications
Publication 2706–816
The controller logic program controls the LED by clearing or setting
the bit at the indicator tag address. The terminal continuously
monitors all LED indicators (with indicator tag assigned) in the
background. When it detects that an indicator bit is set, it turns on
the LED at once, independently of any messages that may be
displayed.
The application description explains what each LED’s function is.
A MessageView terminal set up as a Slave Port can address up to 14
slave devices individually. The slave devices display messages sent
to them by the master device.
The following Allen–Bradley products may be used as slaves:
•
Dataliner

DL10
•
Dataliner

DL20
•
Dataliner

DL50 (short and long versions)
•
MV421D terminal without Daughterboard card; see Page 4–14.
Note: The connection between the master and each slave device is
RS-232/Simplex. See the wiring diagrams and pinouts in Chapter 6.
Slave Port setup
Follow this procedure to set up a MessageView terminal as a slaving
(master) device:
1. Download a MessageBuilder application to the MessageView
terminal master device.
2. Connect the master terminal to its slave(s). See wiring diagrams
and pinouts in Chapter 6.
3. Access the Front Panel Editor by simultaneously pressing the up
and down arrow keys on the terminal keypad.
4. Verify that the terminal’s RS-232 port is set to Slave Port. See
Page 3–3.
5. Exit the Front Panel Editor. Messages are displayed on the
terminal and sent to the individual slave devices as specified by
the application.
Slave Ports