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PLC programming

Interface to the ETC

System variables of the ETCxM

8.7

8.7.3

359

EDSTCXN EN 2.0

8.7.3 System variables of the ETCxM

Currently the data blocks of the PLC are freely available as data memory for

the ETCxM.

8.7.4 Using machine constants in the ETCxC

In the ETCxC the machine constants MK_DW224_255 [MC_DW224_255]

are freely available to store machine−specific values.

For the ETCxC these are shown in the data block 2 after data word 224, so

that the content can be read by the PLC. The system variable

"DB2_nc2sps_maschinenkonstante_aw"

["DB2_nc2plc_machineconstant_aw"] points to the values of these

machine constants.

The machine constants MK_TECHNOLOGY_DATA_1 to

MK_TECHNOLOGY_DATA_4 are available for technology−dependent data.

The contents of these machine constants are stored in the parameter field.

Index Machine constant

760 ... 769 MK_TECHNOLOGY_DATA_1

770 ... 779 MK_TECHNOLOGY_DATA_2

780 ... 789 MK_TECHNOLOGY_DATA_3

790 ... 799 MK_TECHNOLOGY_DATA_4

These parameter field entries can be read via the functions

READ_PARAM_INT, READ_PARAM_DINT etc.

8.7.5 Using machine constants in the ETCxM

The machine constants MK_TECHNOLOGY_DATA_1 to

MK_TECHNOLOGY_DATA_4 are available for technology−dependent data.

These machine constants contain 10 entries each. The value range of each

entry corresponds to a 64 bit floating point value (IEC61131 data type LREAL).

The individual entries can be read via the function "GetUserParam()" from

the PLC.

8.7.6 Parameter field of the ETCxC

The ETCxC provides a so−called parameter field (P field) which contains

different system parameters which might be of interest to the PLC.

In "SysEtc.LIB" functions are available for the read and write access to

parameter entries (see "READ_PARAM_INT" or "WRITE_PARAM_INT" etc.).

The individual entries in the parameter field are described in the chapter

"ETC programming NC operating system".

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ama 11 Jan 2025 | 19:35:39

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Lenze ETC Motion Control Manual do Utilizador Página 359

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