Siemens SINUMERIK 840C Installation Instructions Manual page 740

10 Axis and Spindle Installation
10.5 Spindle installation, spindle functions
General notes:
• With a spindle speed of 0.1, the feed actual value indication in the basic display with
functions G95/G96 is too low by a factor of 10.
• If the system includes several spindles, a function must always be assigned to the first
spindle.
The diagram "Structure of spindle control" provides an overview of the functions available and
also the flow of data and commands. Data flows in the direction indicated:
Setpoints and control data
Actual values and status data
Switching commands
Status
Structure of spindle control
10–50
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PROCESSOR
Switching logic
Mode switching
Monitoring functions
Link RAM
Open-loop speed control
Servo position control
Monitoring functions
Measuring circuits
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Command
PLC
channel
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SINUMERIK 840C (IA)