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Data transfer safety area >>> standard area
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To transfer data from the safety area of the device to the standard area of the device:
1 Declare exchange variables in the safety area
► In the safety extension area of the device tree:
Double click on [DataToNonsafe]
> Editor window shows table with currently declared variables.
► Enter the designations for the exchange variables of data type BOOL in the column [Variable].
Do not logically link non-safe with safe data to form a safe output signal
► In the standard area of the device tree:
Double click on [DataFromSafe]
> Editor window shows declaration part of the global variable list.
► Click on [Update].
> CODESYS applies the declared exchange variable from [DataToNonsafe] (step 1).
> Declaration part shows the declared exchange variables.
The logical exchange devices must only be defined in the safety area. A change in the
standard area is not permitted.
If variables are added or changed in the logical exchange device, it is mandatory for the
developer to update the respective variable list (step 2).
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