Configuration of a differential analog input

This function calculates the difference between the values of two analog inputs. The function is added to the station as a device.

1. In Secure Connect, select the station and go to Devices > New device.
2. In the device list, select Differential Analog Input - CCD.
   This function uses both ports on the CCD 401.
3. Configure the settings for the data point and for each port.
4. Configure the alarm settings for the function. The values must be within the range of the function.
   Start of function range: Port 1 range minimum + port 2 range minimum.
   End of function range: Port 1 range maximum + port 2 range maximum.
   For example, if port 1 has the range 0 to 200 and port 2 has the range -100 to 100, then the function range is -100 to 300.
5. Select Add device.