300767

Common Causes

• 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)

Troubleshooting Steps

1. 1Please inform the authorized personnel/service department.
2. 2The natural frequency in Hz of a speed setpoint filter must be less than the reciprocal value of two speed controller cycles.
3. 3Speed 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)
4. 4Clear alarm with the RESET key in all channels. Restart part program