Data Structures And Data Assignment; Data Access - Siemens SINUMERIK 840C Installation Instructions Manual

12 Functional Descriptions
12.19.5 Interpolation and compensation with tables
12.19.5.2

Data structures and data assignment

The functions of IKA and IKA Stage 2 are parameterized by the user via the individual data
types depending on the functions that he wants.
The sum of the data types can be divided into three data areas.
• %IKA1 Definition of IKA configuration
• %IKA2 Definition of compensation curves (IKA curve)
• %IKA3 Definition of compensation points (IKA points)
%IKA1
This data area comprises all the definitions for the 32 possible IKA configurations (IKA1 to
IKA32). In this data area, a parameter block exists for every IKA configuration. This data area
can be partly parameterized by G functions in the part program.
%IKA2
The compensation points for each of the 32 possible compensation curves (IKP1 to IKP32)
can be selected via the start and end pointers and combined to produce the actual control
curve.
%IKA3
This data area represents the sum of all the used and unused compensation points.
The data area range can be defined via the flexible memory configuration. The maximum
configuration consists of 65 535 value pairs, each of which consists of the position of the input
quantity and the associated value of the output quantity.
12.19.5.3

Data access

The data areas %IKA1, %IKA2 und %IKA3 can be read and write-accessed in the following
manner:
• Via operator panel/machine data dialog
• Via part program
- with @ 30c/@ 40c
- with G functionsG410/G411/G412 and
for CGI G400/G401/G402/G403
• Via MMC/data transfer
• From PLC via command channel (fct. no. 10 and 11) -
• Via OEM applications
You will find a description of this procedure in the OEM documentation for the SINUMERIK
840C: Users Guide and Reference Guide.
12–194
– IKA configurations
– IKA curve pointers
– IKA points
– IKA configurations
– IKA curve pointers
– IKA points
– IKA configurations
– IKA configurations
– IKA curve pointers
– IKA points
IKA configurations
© Siemens AG 1992 All Rights Reserved
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SINUMERIK 840C (IA)