PLC system TwinCAT

The implementation of the HLI PLC library for both PLC systems contains global pointers to the specific areas of the HLI. That pointers are used to access control units and status data or other data of such an HLI area. The following table shows the name of the pointers and the availability for each PLC system:

Table 15-1: Global pointer to HLI areas

Global Pointer

Description

TwinCAT

pPlatform

Platform specific area

X

pMC

Array of pointers to channel specific area

X

pAC

Array of pointers to axis specific area

X

pCTM

Array of pointers to area concerning order administration

X

pVEGlob

Pointer to global V.E. variables

X

pVE

Array of pointers to channel specific V.E. variables

X

Please take care, only pointers are initialized, which are supported by the PLC system and make sense concerning the number of channels or axes of the running configuration of the NC kernel. All other pointers are NULL-pointers.