Sinumerik Alarm 27256 PROFIsafe: Current cycle time %1 [ms] > parameterized cycle time
Parameters:
%1 = Current PROFIsafe communication cycle time
Definitions:
The current PROFIsafe communication cycle time is greater than the value set via MD $MN_PROFISAFE_IPO_TIME_RATIO. The parameterized PROFIsafe communication cycle time is continually exceeded on the PLC side.
Reactions:
– Mode group not ready.
– NC Start disable in this channel.
– Interface signals are set.
– Alarm display.
– NC Stop on alarm.
Remedy:
Adapt cycle time via MD $MN_PROFISAFE_IPO_TIME_RATIO. The displayed value, at least, has to be set. The set cycle time affects the runtime load of the PLC module. This also has to be taken into consideration when making the setting.
Program Continuation:
Clear alarm with the RESET key. Restart part program
References
- Siemens Diagnostics Guide by Siemens