RTA 460BSUSB-N70U, Руководство пользователя

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Transmit Data
– Triggering Methods
There are 3 methods that determine when the message is ready to be transmitted to your ASCII device:
1)
Cyclic – This means that every x ms a new ASCII message will be transmitted, regardless of whether
the data has changed or not.
2) Triggering – This means that a trigger event determines when a new ASCII message will be
transmitted.
Some methods can co-exist with others. Here are the optional rules:
a)
Option 1: Change-Of-State is defaulted, so this method is chosen if the Transmit Timeout field is
left at 0 and ALL data is new.
Example 1: Send a message of “hello” from the PLC to the RTA gateway. The ASCII device see’s
“hello”. Send “hello’ again and nothing will happen because of the RTA Ch ange-of-State Rule.
b) Option 2: Technology Triggering (A/USB/TCP/WI). This method is chosen if the Transmit
Timeout field is left at 0 and the Trigger Variables (as described in ASCII Configuration –
Technology Triggering Method section of this manual) are mapped. This will disable Change-of-
State. This method is recommended if your product in
NOT an 460ETC product.
NOTE: If you have an 460ETC it’s high recommended you use the Optimization
Triggering.
Example 2: Using the Technology Triggering Mappings (shown below in the Technology
Triggering Method section
), you can make the data new only with a trigger. If you want to send
the same/new message of based on a trigger and NOT cyclically, keep the Transmit Timeout at 0
AND use the 2 Trigger Mappings. See below for more examples in the ASCII Configuration –
Technology Triggering Method.