Siemens simatic et 200s Operating Instructions Manual page 140

1PosInc/Analog
4.6 Functions of the 1PosInc/Analog
Example 2: Reference Point Run with Minus Limit Switch
● Start position: between the minus limit switch and the plus limit switch
● Start direction: Minus
● Reference signal: Reference switch
● Reference switch: Minus limit switch
Figure 4-14
You can also carry out synchronization at the limit switch with the following zero mark.
If the start position is at the limit switch, the 1PosInc/Analog controls the drive directly with
creep feed in the referencing direction.
140
Reference Point Run with Minus Limit Switch
Operating Instructions, 05/2007, A5E00124871-04
ET 200S Positioning