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10. PLC Help Function
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Note that the number of displayed external alarm messages depends on their number of
characters.
Number of External alarm message characters
0 to 32 characters 33 to 64 characters
4 messages displayed 2 messages displayed
65 to 96 characters 97 to 128 characters
2 messages displayed
(Note that the second message has up to 32
characters from the head)
1 message displayed
A
larm message 1 starts.......................
........................................................
........................................................
....................... Alarm message 1 ends
A
larm message 1 starts.......................
........................................................
........................ Alarm message 1 ends
A
larm message 1 starts...............….....
....................... Alarm message 1 ends
A
larm message 1 starts............1 ends
A
larm message 2 starts............2 ends
A
larm message 3 starts............3 ends
A
larm message 4 starts............4 ends
A
larm message 2 starts.......................
....................... Alarm message 2 ends
A
larm message 2 starts.......................
10.1.3 Message Creation
(1) Alarm message type
Create messages by using PLC development software (GX-Developer).
(Note 1)
Set the number of characters for one message and the number of messages to be prepared,
then enter message data through the keyboard.
The maximum length of an alarm message is 32 characters.
A maximum of 512 alarm messages can be prepared. For details, refer to “PLC Development
Software Manual (IB-1500177)”.
(Note 1)
PLC Onboard does not include the message creation function.
(2) External alarm message type
Text-form PLC alarm message can be input as the External alarm message.
Moreover, PLC alarm message can be input or output with a maintenance data format.
Details of the external alarm messages creation method are described below.