How to determine Communication error in IAC between 2 controllers?
When using MMS read blocks we can get an error bit from "Valid" if there is any communication error. In IAC if there is any communication error or Control network breakdown between only one of its slave controllers. How that error can be derived in IAC for display or any other application purpose?
Asked 11 months ago
Answers
2
Use the GetCVStatus block.
0
There is one more simple method to get status of a CV variable.
In the program or control module where CV variables are defined. In that write the following line in a page,
CV_variable:status := Comm_Status;
In the above example CV_Variable is your communication variable and Comm_status is a dWord type variable to which you want to write status.
Using this dWord variable we can define communication error.
This method can be followed in all versions of 800xA.
In the program or control module where CV variables are defined. In that write the following line in a page,
CV_variable:status := Comm_Status;
In the above example CV_Variable is your communication variable and Comm_status is a dWord type variable to which you want to write status.
Using this dWord variable we can define communication error.
This method can be followed in all versions of 800xA.
Answered 9 months ago
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