try to put a low volt in 56-14 such as 0.5 volt DC and check what happen ,..
check motor and cable , check the resistor between power board N1 ...Nn
and let me know what kind of control and machine yo have problems
clean up all board and retide all connection on this modles of siemens drive always use full ,
i need more information on this fault , then i can help you , whats the control alarm ?