Output frequency limitation status is not set as expected

Corrected from:
  • Servo Inverter 9400 HighLine with firmware V14.08.00 and higher
  • Servo Inverter 9400 Servo PLC HighLine with firmware V08.08.00 and higher


Response of the new version:

In the case of a frequency limitation due to dual-use limitation or when the maximum output frequency of 1/8 of the switching frequency is reached, the setpoint speed limitation is indicated, as expected, in the status display:
  • MI_bLimitationActive = C2569/3 = TRUE
  • MI_bSpeedSetpointLimited = C2569/5 = TRUE
  • The corresponding states in the status word of the motor control are, as expected, set to TRUE 
 
 
What happens?

The variables

  • MI_bSpeedSetpointLimited including the corresponding display parameter C2569/5
  • MI_bLimitationActive including the corresponding display parameter C2569/3
  • and the corresponding states in the status word of the motor control C156

are not set to TRUE, as expected, although the output frequency is limited to 1/8 of the switching frequency or to 599Hz.

 
When does this behaviour occur?
The behaviour always occurs when limiting the output frequency to 1/8 of the switching frequency or to 599Hz.
 
Which products are affected?
9400 HighLine all versions
9400 Servo PLC all versions
Note: 
A frequency limitation to 599 Hz is only carried out for devices with the type designation E94C... . For the standard types E94A... and E94B... an export license is still required, because the output frequency is not limited to 599 Hz in servo control mode.
 
Short-term measures:
None
 
Evaluation/recommendations:
Restricted diagnostics. No functional restrictions, the output frequency is limited, as expected.
 

URL for linking this AKB article: https://www.lenze.com/en-de/go/akb/201600663/1/
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