Display the Properties window for a Totalflow Digital Point item and then select the Control tab.
The tab displays the standard Control properties for a Geo SCADA Expert digital point (see Define the Control Settings for a Digital Output Point).
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 value to which the driver can write.
When the Control method is called from the item menu, or from a pick action without a parameter specified, Geo SCADA Expert will prompt the user for a new value. The list that is presented will be the enumerated values from Control tab on the digital point.
When the Treat Value as Bitfield configuration option is clear, and the App/Array/Register refers to a value that is not a floating point value, the driver will write a value where the least significant bit is set to 1 or 0, depending on the user’s selection. In other words, the Offset and Number of Bits fields are ignored. If the value refers to a floating point value, the driver will write 1.0 or 0.0 in floating point format to the Totalflow.
When the Treat Value as Bitfield option is selected, the driver will write the user selected value with the correct number of bits and at the specified offset. For example, with a 16-bit value, an Offset of 2, and a new value of 3, the driver will write 0x000C to the Totalflow. This is a value of 3 (0b0000 0011) with an offset of 2. Floating point values are not supported when the Treat Value as Bitfield option is selected and will cause a configuration error.
After calling the Control method, we recommend that you check the Event Journal (‘Events List’) to ascertain whether the control request was successful.
Further Information