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12 Functional Descriptions 09.95
12.30 Master/slave for drives, SW 4.4 and higher, option
12.30 Master/slave for drives, SW 4.4 and higher, option
The function master/slave for drives consists of the options:
• Master/slave basic package (speed setpoint coupling without torque compensation)
• Master/slave torque compensation control (master/slave operation)
The master/slave basic package and the torque compensation control is described below. The
torque compensation control function is based on the basic package.
12.30.1 Corresponding data
Data for the basic package
NC MD 523*
NC MD 1336*
NC MD 1812* Bit 4
Bit 7
NC MD 2700*
Interface DB 31
Interface DB 32
Alarm 1012*
Alarm 1056*
Alarm 2019*
Alarm 2086*
Additional data for torque compensation control
NC MD 1288*
NC MD 1340*
NC MD 1384*
NC MD 1812* Bit 5
Bit 6
NC MD 2701*
NC MD 2702*
NC-MD 2703*
NC-MD 2704*
General notes
"Master/slave operation" is required for the following applications to which different principles
apply:
• For power gain:
In this case, two or more drives are securely coupled to an output shaft mechanically (e.g.
to the main machining spindle). This application is defined when a machine is planned and
cannot be changed during operation or only with difficulty. Master/slave operation remains
unchanged during the entire operating time of the machine (power-on functionality).
• For supporting a mechanical coupling:
To support the control in the "temporary mechanical coupling" of two (or more) drives,
e.g. synchronous spindle operation during a parting operation or mechanical coupling of
two normally independent machine tables by means of bolts, clamps and the like. This
application is activated and deactivated during operation and is only active while there is a
"mechanical coupling" (on-line functionality).
12–304
© Siemens AG 1992 All Rights Reserved 6FC5197- AA50
SINUMERIK 840C (IA)
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