BECKHOFF EL7037 - Manual (Page 119)

Commissioning
Fig. 132: Changing the PLC path
• Under NC configuration an EL7041 is already linked to the NC. To change the link or add additional
devices proceed as described under „Integration into the NC configuration [ } 104]“.
The PLC program is configured as follows. The libraries TcMC.lib and TcNC.lib must be integrated (see Fig.
“Required libraries”).
Fig. 133: Required libraries
Subsequently certain global variables are declared (see Fig.5). The data types PLCTONC_AXLESTRUCT
and NCTOPLC_AXLESTRUCT deal with the communication between the PLC and the NC.
Fig. 134: Global variables
Once the global variables have been declared, programming can commence. Start with declaring local
variables (see Fig. „Local variables“).
MC_Direction is an enumeration type that specifies the direction of travel for the block MC_MoveVelocity,
EL70x7 119 Version 1.0