IDEC FL1E-H12RCA User Manual page 211

Restriction
A maximum of 50 message texts are available.
Functional description
When IDEC SmartRelay is in RUN mode, IDEC SmartRelay
displays the message text that you have configured along
with its parameter values upon a 0 to 1 transition of the signal
at input En.
Based on your setting for the message destination, the
message text displays on the IDEC SmartRelay Display, the
Text Display, or both.
If you use flag M27 in your circuit program, then if M27=0
(low) then IDEC SmartRelay displays the message text only
if it is from the primary character set (Character Set 1). If
M27=1 (high), then IDEC SmartRelay displays the message
text only if is from the secondary character set (Character
Set 2). (See the M27 flag description in section 4.1).
If you have configured message ticking, the message will
tick on and off the display according to your specifications,
either a character at a time, or a line at a time.
If acknowledgment is disabled (Ack = Off), the message text
is hidden when the status of the signal at input En changes
from 1 to 0.
If acknowledgment is enabled (Ack = On) and the status of
the signal at input En changes from 1 to 0, the message text
is output until it is acknowledged with OK. When En = 1, you
cannot acknowledge the message text.
When multiple message text functions are triggered with
En=1, IDEC SmartRelay displays the message text with the
highest priority (0 = lowest, 127 = highest). This also means
that IDEC SmartRelay displays a newly activated message
text only if its priority is higher than that of previously
activated message texts.
After a message text is disabled or acknowledged, the
function automatically shows the previously active message
text that takes the highest priority.
You can change the view and the message texts by pressing
the keys
IDEC SmartRelay Manual
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IDEC SmartRelay functions
197