Allen-Bradley A-B QUALITY DL20 Series User Manual page 33

Chaining Messages
The chain attribute allows a series of messages to display by triggering only
one message. A message which automatically repeats itself cannot be
chained to another message. If you answer Yes to auto repeat, the chain
message prompt will not appear. The chain message prompt looks like this:
If you answer Yes, a warning message appears:
Note: A message should not be chained to itself, or a loop of chained
messages should not be defined. Message loops such as these are not
allowed. They can only be terminated by special messages #2 or #3,
described in Chapter 5.
You are then prompted to enter a message number.
Enter a number (1-254), then press [Return]. Now, whenever this message is
triggered in the run mode, it is displayed normally. Then the message
chained to this one is displayed, regardless of whether messages are waiting
in the message queue. The message queue is described in Chapter 5. Chains
of up to 35 messages can be created. Only message numbers 1 through 254
are accepted.
Chapter 4
Creating and Editing Messages
CHAIN MSG? N
NO INFINITE CHAINS
MESSAGE NUMBER: 0
4–7