Real Time Automation, Inc.
31
1-800-249-1612
Option 2:
Sends data ONLY on Change of State
We’ll be using an 460ETCA for this example, this will utilize the ETC Optimization Trigger and a
Write
Scan Line for a handshake so that the PLC knows the triggering functionality is working.
*If using the WI (Web Interface 460ETCWI) then use the WI Upload Trigger in your destination mapping*
1)
Configure all your Read Scan Lines your looking to send over to your ASCII device.
2)
Configure a Write Scan line that updates the PLC with the Handshake from the RTAgateway.
*Handshake tag can be unique to your PLC program*
3)
Within the ETC configuration, setup a PLC tag that you can identify as your Optimization Trigger.
*Optimized Trigger tag can be unique to your PLC program*
4)
In the Data Mapping page, manually add 2 additional mappings identical to the example below.
5)
Update all your Read Scan Line PLC tags with data.
6)
Nothing should have updated in your ASCII device.
7)
Update the RTA_Opt_Trigger PLC tag to 1.
8)
Now your ASCII device will be updated with the data.
9)
Increment the RTA_Opt_Trigger PLC tag
10)
The ASCII device should NOT be updated because the data is not new.
