Lenze SCF frequency inverter - Manual (Page 62)

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Lenze 13466146 EDBSF01 v24 EN
Appendix
P64 PROPORTIONAL GAIN
The Proportional Gain setting represents the speed command output (in % of maximum speed) that
results from each 1% of error.
P65 INTEGRAL GAIN
The Integral Gain setting represents the ramp rate of the speed command output (in % of maximum
speed per second) that results from each 1% of error.
P66 PI ACCEL/DECEL
When the PI unit attempts to respond to a sudden step change in setpoint, the result can be unstable
operation. This parameter acts like a "filter" and ramps the setpoint from the old value to the new
value over a programmable period of time to smooth the PI unit's response. If PI ACCEL/DECEL is set
to 0.0 seconds, it is effectively disabled.
P67 MIN ALARM
This parameter represents the process value that the feedback signal must fall below to activate the
MIN ALARM output (see Parameters 6 and 13).
P68 MAX ALARM
This parameter represents the process value that the feedback signal must exceed to activate the
MAX ALARM output (see Parameters 6 and 13).
NOTE
The MIN ALARM function can be used to start and stop the drive based on the level of the PI
feedback signal. This is done by wiring a 2-wire start/stop circuit through the drive's open-
collector output, and setting the open-collector output for MIN ALARM (see Parameters
6 and 13). When the signal drops below the MIN ALARM setting, the open-collector
output will de-energize, which will stop the drive. When the signal is equal to or greater
than the MIN ALARM setting, the open-collector output will energize and start the drive.
P69 0-10 VDC FEEDBACK
This can be used to monitor the PI feedback when using a 0-10 VDC feedback signal. The displayed value
will be scaled according to the MIN and MAX FEEDBACK parameters (62 and 63).
P70 4-20 mA FEEDBACK
This can be used to monitor the PI feedback when using a 4-20 mA feedback signal. The displayed value
will be scaled according to the MIN and MAX FEEDBACK parameters (62 and 63).
P71 ACTUAL FREQUENCY
This can be used to monitor the actual output frequency of the drive (or the scaled version of this if
P39 is not set to "0") when operating in PI mode, as the normal display is scaled to PI units according
to the MIN and MAX FEEDBACK parameters.