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How to use the axis simulation

It is possible to use a simulated axis instead of a real drive.

The axis simulation can be used in the following use cases:

  • When the real drive is not available the simulation can be used to test all available motion functionalities to verify the application program.

  • The simulation can be used to create a virtual master axis and synchronize other axes to it.

The simulation is realized by the function block CMC_Axis_Simu or input Enable_Virtual = TRUE can be used at the KERNEL-block.

Homing will be possible if the limit-switches (data type CMC_Axis_IO) are simulated also. This is not done by CMC_Axis_Simu but could be realized in the PLC program.

Fig. 342: Example for Simulation
usage_centralized15_V3

The drive velocity is simulated by PT1-Characteristic. The input T1 gives the time constant for this PT1 as multiple of the cycle time. All other properties are simulated according to the CMC_Axis_Control_Parameter.

The value of the time behavior from the axis simulation function block set by the input T1 has to be at least four times smaller than the value of the axis parameter Control_Time from the parameter function block. If Enable_Virtual = TRUE is used, no delay will be applied to the simulated drive speed, and it will not be possible to test the position-control loop, but it will be fine to be used as virtual axis.