Function block MCV_Axis

The FB MCV_Axis, which has an AXIS_REF structure as input/output variable, updates the data of an AXIS_REF structure. This FB also performs the following tasks:

Logging an axis to the MCE via the HLI. This is done by setting the "plc_present_w" flag in the axis -specific HLI area
Register the PLC via the HLI so that the PLC can command the MCE with spindle reset, controller enable, feed enable and drive ON for a specific axis.
During initialisation, the consistency of the HLI is verified by checking the version identifier and the size of the HLI.
Adoption of error messages reported by the MCE for each axis

In each PLC application which uses the PLCopen Part1 FB of the ISG-MCP, an instance of this FB must be created for each axis used and an AXIS_REF structure in the form of g_array_axis_ref[i] must be assigned to it as a VAR_IN_OUT parameter.

To ensure this, ISG-MCP contains the FB MCV_P1_PLATFORM (see Sec. MCV_P1_PLATFORM function block) which must be called in a program of a PLC application. This ensures that the working data of one axis is updated in every PLC cycle.

**Providing AXIS_REF by the FB “MCV_Axis”**

Programing Example

Declaration and call in ST:

Declaration in ST:

cam_in_1 : MC_CamIn;

Call in ST:

cam_in_1 (Master:= g_array_axis_ref[0], Slave := g_array_axis_ref [1]);