ADI4 Manual Release 02/2003

Parameterization2.8.10 Homing with zero mark and BEROSystem structureControl e.g.:– SINUMERIK 802D– SINUMERIK 840Di– SIMOTIONPROFIBUS-DPADI4Converter system e.g.:SIMODRIVE 611 withcontrol unit withanalog setpoint interfaceAnalog setpointDigital inputs e.g.Axis 1: (X6–2), Pin 2BERO oroutput cam signalEncoder actual value /zero markMotor e.g. 1FT6Axis e.g. machining tableBERO oroutput camFig. 2-5Basic system structure: Homing with zero mark and BEROÏÏÏÏÍÍÍÍÍÍÍÍFunctionThe BERO or output cam signal is connected as a digital input signal to a digitalinput of the ADI4 (X6–2, Pins 2 – 5). The processing of the BERO signal is performedcontrol-internally during the homing procedure.After detecting the BERO signal, the control reduces the axis velocity to homingapproach velocity and requests via: Encoder control word (Gx_STW):Bits 4 – 6: = 001 –> “Activate function”Bit 7: = 1 –> “Reference mark search (zero mark or BERO)”from the ADI4, homing to the next encoder zero mark. After detecting the request,with the encoder zero mark detected next, the encoder actual value is transferredto the control from the ADI4 as the home position.Without 611U conformant modeNo further measures needed.With 611U conformant modeThe appropriate signal for the axis to be homed (e.g. Axis 1) must be set in thedigital output word by the PLC user program: Digital output wordBit 0: = 0 –> “Axis 1: Zero mark of Encoder 1 (X4–1)”2-48 Siemens AG, 2003. All rights reservedADI4 – Analog Drive Interface for 4 Axes, 02.2003 Edition