Real Time Automation, Inc.
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ASCII Configuration
– Technology Triggering Method
This method allows the other protocol to signal when to send the next message using data handshakes.
These “signals” are controlled using data v
ariables (TransTrigger and TransHandshake) already in the
mapping. This method will send the new/old data when triggered.
NOTE
: These two data variables will need to be mapped manually on the Data Mapping webpage since it
will not be mapped using Auto-Map.
While these two data variables are mapped, the Change-of-State method is disabled but messages can
still be sent via the Cyclic method, if configured. For more information on the ASCII Triggering Methods,
please see the Transmit Data - Triggering Methods section of this user guide.
How the triggering method works: The example shown below is our 460PS* (*A/TCP/USB)
1)
The mating protocol sends a numbered value to the ASCII TransTrigger diagnostic variable. This
value must be different from the previous value for a new message to be triggered. The following
example is Slot 12[0] as the trigger for the PLC to update everything in Slot 11[0] which is the data.
2)
Depending on the TransTigger value in the Display Data page, one of 4 things will occur:
a)
If TransTrigger = 65535, then the triggering method is disabled. Usually on powerup.
RTA460 Display Data Example:
