Siemens SIMATIC ET 200S - 2 DI 24 VDC ST digital electronic module (6 ES7 131-4 BB00-0 AA0)

1PosUniversal/Digital
7.6 Functions of the 1PosU
ET 200S Positioning
Operating Instructions, 05/2007, A5E00124871-04
327
Starting on the hardware limit switch
Direction Response of the 1PosU
Starting into the operating range The 1PosU starts the specified MODE.
Starting away from the operating range The POS_ERR=1 feedback bit is set.