Rockwell Automation 2706-M1 MESSAGEVIEW 421 HARDWARE MANUAL - Manual (Page 72)

4–12 Running Applications
Publication 2706–816
Messages with enabled function keys are terminated by:
•
pressing an enabled function key (non-jog)
•
pressing the Plus/Minus key and Zero 0 key
simultaneously
•
pressing the up arrow , down arrow and Enter keys
simultaneously (resetting the terminal)
•
controller sending a Clear Display command (Special Message
9901)
•
controller sending a Reset Terminal command (Special Message
9903).
Note: The application designer needs to inform the operator which
messages are non–jog and which are jog.
MessageView 421F Terminals (Catalog No. 2706-M1F1 and -M1F)
have a red LED located next to each function key. An LED can be
assigned (tagged) to a specific output bit of a logic controller by the
application.
LED Operation
An LED may be assigned one of two functions:
1. To provide visual feedback to the operator when an associated
function key is pressed (indicator tag not assigned).
2. To allow the logic controller to indicate a process status to an
operator without displaying a message (indicator tag is assigned).
Indicator Tag Not Assigned
When the LED indicator is not assigned to an output bit, then the
LED follows the state of the associated function key (F1 = LED1,
F16 =LED16). For example, LED4 will light when function key F4
is pressed.
Indicator Tag Assigned
When the LED indicator is assigned (tagged) to an output bit, then
the LED indicators operate independently of the function keys. For
example, pressing and releasing function key F1 will have no effect
on the operation of LED1.
LED Indicators