06.93 12 Functional Descriptions
12.7.2 Description of the spindle modes
Possible configurations for the C axis mode
The machine data listed below must be entered for configuring the interfaces and for format
interfacing between actual value, internal computing resolution and setpoint A more detailed
description of this machine data will be found in Section 4 and the Installation Instructions.
•Machine data for configuring the spindle interface
MD400* Spindle assignment, actual value input and servo CPU
MD455* Pulses, variable incremental weighting
MD456* Distance traversed, variable incremental weighting
MD458* Pulse multiplication for HMS
MD460* Spindle assignment, setpoint output
MD462* Cutoff frequency of spindle encoder
MD520* Configuration bits
MD521* Configuration bits
•Machine data for configuring the C axis interface
MD200* Axis assignment, actual value input and servo CPU
MD308* Cutoff frequency of C axis encoder
MD364* Pulses, variable incremental weighting
MD368* Distance traversed, variable incremental weighting
MD384* C axis assignment, setpoint output
MD564* Configuration bits (bit 5: axis is rotary axis)
MD1116* Pulse multiplication for HMS
The following diagrams give an overview of the possible input/output assignments for the C
axis mode. When configuring with two encoders and two drives, the C axis must be declared
an independent axis.
© Siemens AG 1992 All Rights Reserved 6FC5197- AA50
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SINUMERIK 840C (IA)