Relative Gearing - Siemens SIMATIC S7-1500 Function Manual
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Also See for SIMATIC S7-1500:
- System manual (523 pages) ,
- Function manual (362 pages) ,
- Manual (188 pages)
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Basics
3.19 Synchronous operation
3.19.2
Relative gearing
The gear ratio is specified as the relationship between two integers at the Motion Control
instruction "MC_GearIn". The result is a linear transmission function. With relative gearing,
there is a relative correlation between the leading axis and the following axis. The change of
the leading axis position setpoint results from the change in the position setpoint of the
leading axis multiplied by the gear ratio.
Synchronization
Synchronization is begins by starting an "MC_GearIn" job. When a synchronous axis
synchronizes to a master value, it is displayed in the tag of the <TO>.StatusWord.X21
(Synchronizing) technology object. Active motion jobs are overridden. The dynamic values
(acceleration, delay, jerk) of the following axis for the synchronization are specified at
"MC_GearIn".
The following axis is synchronized and moves synchronously to the leading axis when the
following axis reaches the velocity and acceleration of the leading axis, taking the gear ratio
into consideration.
Duration and length of synchronization depend on the dynamic of the leading axis and the
dynamic defaults at "MC_GearIn". A position offset can result between leading axis and
following axis. This position offset is not compensated.
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S7-1500 Motion Control V13 Update 3
Function Manual, 07/2014, A5E03879256-AC
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