UnityPro_XL is a new version of Schneider PLC programming special software, used to program the company's latest models.
Presentation of the Application
The application described in this document is used to manage the level of a liquid in a tank. The tank is filled by a pump, and drained using a valve. The different levels of the tank are measured with sensors placed on the tank.The volume of the tank is shown by a digital display. The application’s operation control resources are based on an operator screen,which shows the status of the various sensors and actuators, as well as the volume of the tank. Depending on the status of the tank level and the application, the user must be alerted by way of alarms, with all necessary information backed up each time these are triggered.
This is the application’s final operator screen:
Operating mode: The operating mode is as follows:
- A Start Cycle button is used to run filling cycles,
- When the high level of the tank is reached, the pump stops and the valve opens.When the low level of the tank is reached, the valve closes and the pump isactivated until the high level is reached.
- A Stop Cycle button is used to interrupt the fill cycles. Pressing this button allows you to set the system to a safe level. The pump stops and the valve opens until the "Low safety" level is reached (tank empty). The valve closes and the cycle stops.
- The pump has a variable flow rate, the value of which can be accessed by the operator screen. The flow rate of the valve is equal to that of the pump.
- Safety measures must be installed:
- Loss of tank’s high level: another level, called "High safety" is activated, and the system is set to failsafe. The pump then stops and the valve opens until the "Low safety" level is reached (tank empty). The valve closes and the cycle stops.
- Loss of tank’s low level: another level, called "Low safety" is activated, and the system is set to failsafe. The valve then closes and the cycle stops.
- For both failsafe modes, a fault message must be displayed.
- The time that the valve is open and closed is monitored, with a fault message being displayed if either of these is exceeded.
User Interface
The screen below shows the Unity Pro user interface:
The user interface is divided into several areas: