300767

Axis %1 drive %2 natural frequency > Shannon frequency

Parameters:

%1 = NC axis number

%2 = Drive number

Definitions:

The natural frequency of a speed setpoint filter is greater than the Shannon sampling frequency from the sampling theorem.

The alarm can be reprogrammed in the MD ALARM_REACTION_CHAN_NOREADY (channel not ready).

Reactions:

-    NC not ready.

-    The NC switches to follow-up mode.

-    Channel not ready.

-    NC Start disable in this channel.

Remedy:

-    Interface signals are set.

-    Alarm display.

-    NC Stop on alarm.

-    Channel not ready.

Please inform the authorized personnel/service department.

The natural frequency in Hz of a speed setpoint filter must be less than the reciprocal value of two speed controller cycles.

Speed setpoint filter 1:

MD 1520 * 0.01 * MD 1514 < 1 / ( 2 * MD 1001 * 31.25 microsec)

Speed setpoint filter 2:

MD 1521 * 0.01 * MD 1517 < 1 / ( 2 * MD 1001 * 31.25 microsec)

Modify MD 1520: $MD_SPEED_FILTER_1_BS_FREQ (bandstop filter natural frequency speed setpoint filter 1)

Modify MD 1514: $MD_SPEED_FILTER_1_SUPPR_FREQ (suppression frequency speed setpoint filter 1) 1)

Modify MD 1521: $MD_SPEED_FILTER_2_BS_FREQ (bandstop filter natural frequency speed setpoint filter 2)

Modify MD 1517: $MD_SPEED_FILTER_2_SUPPR_FREQ (suppression frequency speed setpoint filter 2) 2)

Modify MD 1001: $MD_SPEEDCTRL_CYCLE_TIME (speed controller cycle)

Program Continuation:

Clear alarm with the RESET key in all channels. Restart part program.