Right-click a Device Model or Device Model Feature node and choose Device Initial Equations () from the Devices submenu.

To add a Device Initial Equations node to a physics feature or physics property node, right-click the node and choose Device from the Devices submenu. If added under any of these nodes or a Component node, the device initial equations node belongs to the device models closest in the hierarchy. For most cases this will be the device model added by the physics interface.

Fill in the table with Left-hand side and Right-hand side of an arbitrary number of Device Initial Equations. You can use any device variable, device input, or device constant in these equations. See Device Equations above for details about the conventions of expressions containing device variables.