Red Lion LEGEND - Manual (Page 10)

MESSAGES
The Legend Plus features messaging capabilities that can inform the user of
output actions or other events that occur in a system. Up to ten messages can be
programmed. Messages can be requested by an output status change, User
Input(s), or through serial communications.
When a message is requested, the unit checks if there is a message already on the
display. If there are no messages on the display, the requested message is displayed.
A message on the display is replaced, if the requested message has the same or higher
priority. If the unit is not at the main display, the unit stores one message request. If
subsequent messages are requested while not at the main display, the unit stores the
last message requested, or the highest priority message requested. 2.5 seconds after
the user returns to the main display the stored message is displayed.
If a message is displayed and the user presses the appropriate key to get to the
Preset, Scaling or Programming menu display, the displayed message is temporarily
suspended. While the message is suspended the message timer, if used, is also halted.
2.5 seconds after the user returns to the main displays, the message is redisplayed and
the message timer resumes. If the Up or Down arrow key is pressed while in the main
display loop, the message is also suspended, and the appropriate programmed
display is shown. The message is redisplayed 2.5 seconds after the last key press.
USER INPUT MESSAGE REQUEST OPERATION
Individual User Inputs can be programmed to activate any of the ten messages.
The messages can be maintained or momentary. Messages can be assigned a
priority from 1 to 8 (1 is highest). This assures that very important messages are
displayed first.
BINARY MESSAGE REQUEST OPERATION
Two, three or all four of the User Inputs can be configured to request messages in a
binary fashion. Messages 1 through 9 can be requested in this manner. The binary
state 0 (all binary inputs inactive), is used to indicate no message requested. During
the scanning of the binary message request inputs, if the Input state is the same as the
last requested binary message no change will occur. When an input change occurs,
the unit requests the message number corresponding to the state of the inputs. The
inputs must be stable for 100 msec (debounce time) for the message to be requested
(See Program User Module for more details). Changing the individual binary
message request input lines slowly will cause unwanted message requests, if several
bits need to be changed. This would be noticeable on the display, if a user was
utilizing a thumbwheel switch to change between messages.
OUTPUT MESSAGE REQUEST
Each output can be individually programmed to request a specific message when
activated. The appropriate message will be requested regardless of the method used
to activate the output, i.e. User Input, Count/preset processing, serial command, etc.
Note: The Output must be active for a minimum of 50 msec. for the request to be seen.
MESSAGE CANCELLATION
Messages can be cancelled automatically, or manually. When cancelled,
messages programmed for maintained request, will be re-requested if the display
is available and the request source is still active. A request for a message of the
same or higher priority will cancel the current message on the display. Messages
can also be cancelled by a User Input programmed for Cancel Message or via the
serial port. The three programmable cancellation options are Latched, Timed,
and Til End. (See Program User Message Cancellation for details).
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