General

A cam switch can be used to control actuators or machine sequences during a motion sequence depending on a data source (e.g. from a physical encoder). The cam switch function of the software module digitally simulates a mechanical cam switch.

A cam switch can consist of several cam tracks. Each cam track is assigned a binary switching signal. A cam track is divided into cam windows. A cam window is a value range or a defined switching point where the switching signal of the cam track assumes a defined value.

Each cam track generates a binary switching signal that is set as soon as the signal is within one of the assigned cam windows or the limit of a time cam is reached. The cam tracks are processed with the cycle time set in the MOVI-C^® CONTROLLER. This cycle time is at least 1 ms. The switching signal can be output at a digital output of a connected periphery.

The following data sources can be processed:

• Actual position of an external encoder
• Actual position of an axis
• Setpoint position of an axis
• Any signal generated by the user (e.g. fill level, flow rate, motion profile)

To calculate the correct switching point taking into account a dead time, the derivations of the signal are required. The derivation is also provided by the data sources.