How can resolve problem F01221 fault in siemens 6RA80 DC Drive ?
Cause : CU: Bas clk cyc too low. The closed-loop control / monitoring cannot maintain the envisaged clock cycle. The runtime of the closed-loop control/monitoring is too long for the particular clock cycle or the computing time remaining in the system is not sufficient for the closed-loop control/monitoring. Fault value (r0949, interpret hexadecimal)
Remedy:
Increase the basic clock cycle of DRIVE-CLiQ communication.
See also: p0112 (Sampling times pre-setting p0115)