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5. MONITOR FUNCTIONS AND THEIR USE
MELSEC-A
5.4.5
Displaying a character string (comment) using an error alert (warning) function
[Function)
This function displays a character string (error alert message) in the blink
mode when any of the following errors occurs:
Removing the error-causing factor automatically clears the character string.
The character string cannot be forcibly cleared.
During monitoring, the operating system (OS) always checks each monitoring
screen to see if an error has occurred.
(1)
Error alert function for errors defined by the user
This function checks if an error defined by the user occurs.
If any of the bit devices whose alerts are set to ON in the announcement
setting (see (2)-(b) of the monitor screen creation section on the next
page), an error alert message is displayed as shown below:
Errors specified by the user can be confirmed by checking the error
•
occurrence history displayed on the announcement screen (see Section
10.4).
However, in the announcement setting, turning ON a bit device pre-
vlousty set to OFF does not cause an error alert message to appear on
the monitor display.
Max. 64 characters
Max. 6 characters
(2) Error alert function for system errors
•
...... "
Max.70 characters in all
r-------------....,
,
,
:
Device No.
:
L
-l
t_______
Shows which of the devices set
to ON in the announcement
setting window are actually
turned ON.
L -
Alert message set in the error alert window.
This function checks if a error has occurred in the PC CPU, MELSEC-
NET(lI), or G-controller
When an error occurs, this function displays an error alert message.
Errors occurring in the PC CPU and G-controller can be confirmed by
checking the error occurrence history on the system alert screen
(see Section 10.8).
~-------------------~
,
,
: Error Alert message:
L
..J
I
Max.64
characters
Max.S
Max.5 characters
characters
','--E~;;r-al~rt
--: ,
~ E-r;~;~~~-u-rr~~~~
-:
r- - - - - - - - - - -
~
I
I
:
Error code'
Max.74 characters in all
: message
:: location
: :
:
L
..J
L
--J
L
.J
L
t
Corresponding error code
(see Section 13)
Error occurrence location
YCPU~:
Error occurred in the PC CPU.
"MNET": Error occurred in the MELSECNET(II).
YGCONr: Error occurred in the G-controller
' - - - - - - - - - - - Alert message set in the error alert window.
5-48
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