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10. PLC Help Function
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10.1 Alarm Message Display
There are two types of alarm message, which can be selected with a parameter (described later)
Format Alarm message External alarm message
Max. No. of messages 256 messages 256 messages
Max. data length 32 bytes per message 128 bytes per message
Number of
Display messages
4 messages
1 to 4 messages
(according to data length)
Interface
F type / R type
(classification No. designated)
F type / R type
(without classification No.)
Available language 2 languages 8 languages
Store method User PLC attached data
Independent data
(other area)
10.1.1 Interface
The alarm message display interface is available in the two types: F type in which temporary
memory F is used for message display request and R type in which file register (R) is used for
message display request. Either type is selected by using a parameter.
(1) F type interface
This interface applies to 128 points of temporary memory F0~F127.
If temporary memory F is used as the alarm interface, do not use it for another purpose.
F0
F1
F2
F3
F4
F5
1
0
1
1
0
1
1
0th message of message table is displayed (dn1).
Second message of message table is displayed (dn
2).
Third message of message table is displayed (dn
3).
Fifth message of message table is displayed (dn
4).
F127
The highest priority is assigned to the F0 signal. The message corresponding to Fn set to 1 is
fetched from the message table and displayed in order starting at F0. If no messages are
prepared or Fm greater than the number of prepared messages is set to 1, the message
"USER PC ERROR m
" is displayed.