Use the fields at the top of the Control tab to define the range of values that an operator can send to control the plant, and the severity of any events and alarms that are associated with the control action:
The tab displays the standard Control properties for a Geo SCADA Expert analog point, see Define the Analog Control Settings in the Geo SCADA Expert Guide to Core Point Configuration ofr information about the properties.
If the Enabled check box is selected, you will get access to the control aggregate and you can call the Control method on the point to change a parameter’s value in the Totalflow. This is providing that the App/Array/Register for the point refers to a parameter to which the driver can write.
UNEXPECTED BEHAVIOR OF APPLICATION
When the Control method on the Control aggregate is called from the object menu, or from a pick action without a parameter specified, Geo SCADA Expert will prompt the user for a new value that is within the range of the Minimum and Maximum settings. It is important to set the Minimum and Maximum values correctly for the value that is referred to by the point. For example, a point that refers to a UINT8 value can only hold 8 bits, and has a range of 0 to 255. A control request to 324, for example, could have unintended consequences.
ATTENTION: If a user specifies a decimal value for a point that refers to an unsigned integer, the driver will truncate the value and write it to the Totalflow. For example, a write request of 13.6 for a point that refers to a value that is of type UINT8 will result in the value of 13 being written to the Totalflow. This is because unsigned integers cannot hold values with fractional components.
After calling the Control method, we recommend that you check the Event Journal (‘Events List’) to ascertain whether the control request was successful.