6RA70 - PLC.zip

Project of controlling 6RA70 DC drive on Profibus by PLC S7-300.

Used simple instrunctions (for better understanding) & only drive related inputs/outputs are configured. Additional DI/DOs are available for interfacing more I/Os. 

Object of this tip is to help user to understand basic concepts of how to establish communication & transfer/receive basic data.

MW0 - Memory word which transmits control signals to drive e.g. START, STOP, CW & CCW direction. (M0.0 ... M1.7)

MW16 - Drive speed setpoint.

MW12 - Motor low speed limit

MW14 - Motor max/high speed limit.

MW20 - Drive stastus e.g. drive ready, drive at fault etc. etc.

MW22 - Motor actual speed.