Some of the data links on the TANK101 picture were set up
to allow changes by the operator. When you move your pointer over these fields,
they are highlighted in a box. To make a change, click the field, type in a new
value, and press Enter.
Click the value for the data link for the loop setpoint.
The value is highlighted.
Type a new value, such as 50, and press
RETURN.
If you used a placeholder for a controller to do the tutorial,
you will not be able to change this value.
