Function block MCV_AxesGroup

FB MCV_AxesGroup updates data of an AXES_GROUP_REF structure and has an AXES_GROUP_REF structure as input/output variable. This FB also performs the following tasks:

• Logging an Axis group to the MCE via the HLI. This is done by setting the "plc_present_w" flag in the channel-specific HLI area
• A check is made on initialisation if axes are assigned to an axis group. If this is the case, these axes are added to the PLC-internal axis group mapping without needing to command an MC_AddAxisToGroup FB.
• Adoption of the error messages reported by the MCE for each channel

In every PLC application which uses the PLCopen Part4 FB of the ISG-MCP, an instance of this FB must be created for every axis group used. This instance must be assigned an AXES_GROUP_REF structure in the form of gAxesGroupRef[i] as VAR_IN_OUT parameter.

To ensure this requirement, ISG-MCP contains the FB MCV_P4_PLATFORM. This FB must called in a program of a PLC application. This ensures that the working data of one axis is updated in every PLC cycle.