At run time the application logs errors about the control list selector to diagnostics under these circumstances:
If the Value connection is unassigned:
If a state’s value is too large for the data type of the tag assigned to the Value connection, or if the value is outside the assigned tag’s minimum and maximum values:
For example, the state value is too large for the tag’s data type if your data source is a PLC-5®, the state value is 2,147,483,647, and the assigned tag is an integer tag using the address N7:0. Integer tags have a range of -32,768 to 32,767 only.
If Enter key handshaking is set up and "Write on enter" is selected (on the General tab), the Enter connection is not set to 1, and the handshake timers do not begin timing.
If the control list selector’s Enter key handshaking is still in effect when the operator presses the Enter button:
Set up connections for the control list selector
How Enter key handshaking works at run time