What is Direct Action and Reverse Action - Understanding Process Controller Action
Today we are going to discuss about what is Controller Action and factors that determine Controller Action. In addition to this, the technical video has one example to explain the controller action concept in detail.
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Video content:
1. What is Controller Action?
2. And different factors that determine controller action.
3. An Example to explain the controller action concept in detail.
1. What is Controller Action?
Controller action is function in controller, which determines whether Controller output increases when process variable increases above set point, or controller output decreases when process variable increases above set point.
Generally, operator has to select controller action from the controller based on their process requirements.
Types of Controller Action:
There are mainly two types of controller action.
First type is direct action.
In direct action, either controller output increases when process variable increases above set point.
Or controller output decreases when process variable decreases below set point.
Second type is reverse action.
In reverse action, either controller output increases when process variable decreases below set point. Or controller output decreases when process variable increases above set point.
2. Different factors that determine controller action.
First of all, controller action depend on the location of flow control element.
In other words, It is very important to know, whether flow control valve is located at input side of process ,or it is located at output side of the process.
Secondly, controller action also depend on the need for fail safe operation.
Last but not least, controller action also depends on the type of valve action.
For example, whether valve is air to open, or it is air to close.
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
If you have missed our most recent videos, then watch them here:
1. What is Closed Loop Control System and Open Loop Control System
• What is Closed Loop Control System and Op...
2. How to perform Kurz Thermal Mass Flowmeter Calibration
• How to perform Kurz Thermal Mass Flowmeter...
3. Endress Hauser Cerabar Pressure Transmitter Set-up | Position Zero Adjustment
• Video
4.Endress+ Hauser Promag 400 Magnetic Flowmeter Heartbeat Verification
• Video
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Keep Supporting us.
|| LIKE || COMMENT || SUBSCRIBE