Siemens simatic et 200s Operating Instructions Manual page 334

1PosUniversal/Digital
7.6 Functions of the 1PosU
Execution of a Reference Point Run Depending on Parameterization and Start Position
In a reference point run, you have to distinguish between different cases that depend on the
following:
● The start position of the drive at the start of the reference point run
● The assigned parameter start direction
● The assigned parameter reference signal
● The assigned parameter reference switch.
Example 1: Search for Reference Point Run with Reducing Cam and Zero Mark
● Start position: between the minus limit switch and the reducing cam
● Start direction: Plus
● Reference signal: Reference switch and zero mark
● Reference switch: Reduction cam towards plus
Figure 7-11
You can also carry out synchronization using the reducing cam without a zero mark.
If the start position is on the reducing cam, the 1PosU controls the drive directly in creep
feed mode in the referencing direction.
334
Search for Reference Point Run with Reducing Cam and Zero Mark
Operating Instructions, 05/2007, A5E00124871-04
ET 200S Positioning