Control Valves

To add a control valve drag the control valve icon from the device palette.

This will bring up the device properties window for the control valve.

Specify the field as follows:

Field	Description
Valve Status	This is the status of the valve (see below).
PID Mode	This field indicates which parameter should be used to control. Set the value of this field to be: 1 - Flowrate 2 - Inlet Pressure 3 - Outlet Pressure
Control Mode	This field indicates whether the field is in manual or automatic mode. Set the value of this field to be: 1 - Manual 2 - Automatic
Flowrate Value	This is the measured flow rate field.
Flowrate Setpoint	This is the flow rate setpoint that should be maintained while the valve is in automatic mode. If the mode is automatic this field is not used.
Flowrate Maximum	This is the maximum flow rate.
Flowrate Minimum	This is the minimum flow rate.
Inlet Pressure Value	This is the inlet pressure field.
Inlet Pressure Setpoint	This is the inlet pressure setpoint that should be maintained while the valve is in automatic mode. If the mode is automatic this field is not used.
Inlet Pressure Maximum	This is the maximum inlet pressure.
Inlet Pressure Minimum	This is the minimum inlet pressure.
Outlet Pressure Value	This is the outlet pressure field.
Outlet Pressure Setpoint	This is the outlet pressure setpoint that should be maintained while the valve is in automatic mode. If the mode is automatic this field is not used.
Outlet Pressure Maximum	This is the maximum inlet pressure.
Outlet Pressure Minimum	This is the minimum outlet pressure.
Valve Percentage Open	This has the position of the valve.
Valve Keypad Percentage Open	This is the keypad position of the valve.

Linking to the Control Valve Detail Page

Each control valve can be linked to a detailed page.

Double click on the control valve in the P&ID to bring up the device properties.
Click the 'Screen' checkbox. This will automatically create the control valve screen.
Click the 'OK' button.
Choose 'Save' from the 'File' menu in order to save the P&ID.

This will insert a 'Details' button in the sidebar. The screen will automatically use the fields defined in the field properties

Tip: You may have to refresh the P&ID to make the button appear.

The icon displayed on the P&ID is based on a status value from the flow computer/ PLC.