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10. PLC Help Function
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10.2 Operator Message Display
When a condition to inform the operator of a message occurs, an operator message can be
displayed independently of an alarm message.
A maximum of 60 characters can be displayed for the operator message on the alarm diagnosis
screen. One operator message can be displayed at a time.
10.2.1 Interface
An operator message is displayed by setting the number of the operator message table to be
displayed in file register R162. It is cleared by setting R162 to 0. Thus, number 0 of the operator
message table cannot be displayed.
Display example
(Note 1)
As with alarm messages, the contents of the data register specified for the class number display in
operator message preparation are also displayed.
(Note 1)
The class number display is updated when the contents of file register R162 change.
It is not updated if only the contents of the specified data register (Dn) change.
To change the class number display only, the contents of R162 must be cleared to 0. If
the contents
of the specified data register are 0, no class numbers are displayed.