Causes of maintained push button runtime errors

If the button’s state 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, the application does not write the value to the Value tag, the state does not change, and the application logs an error.

For example, the state value is too large for the tag’s data type if the 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.

If the Indicator tag value does not match any of the state values for the push button, the button displays the error state.

If the Value connection is not assigned, the error state is displayed. When an operator presses the button the state does not change and the application logs an error.