Properties and Commanding
You change the current state of a property by commanding it. Once you command a property, the status of the command displays for the selected object. If the command fails, the reason for the failure displays so that you can take further action.
Examples of common commands:
- Acknowledge
- Change command priority
- Coldstart
- Enable/disable
- On/Off
- In service/Out of service
- Override/Release
- Reset value for equipment operating hours
- Set a new point value
- Upload
Display of Properties
Properties display in one of two ways—automatically or manually. They display automatically when a property goes into an off-normal state, and they display manually when you select an object in the system.
Why Command a Property?
You command a property to change its current state. For example, you might command to initiate an action, enable or disable a property, acknowledge or reset the status of a property, or override or release an override of a control program.
Commanding a property is also useful under these conditions:
- User action is required to manage an emergency
- When an alarm indicates a malfunctioning device
- When performing preventive maintenance
- To save energy
- When managing operating hours totalization
Example of Commanding
At your facility, you want to change the temperature from 68 to 73°F (20 to 22.78°C) in a conference room on your floor. Using your building control software, you send a command to change the Present Value of the Temperature Setpoint object of the room to override the normal system control.
