LEESON SM-Plus Series Sub-Micro Inverters - Manual (Page 59)

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 when operating in PI mode, as the
normal display is scaled to PI units according to the MIN and MAX FEEDBACK parameters.
P74 ANALOG INPUT FILTER
This adjusts the filter on the analog input terminals (TB-5 and TB-25) to reduce the effect of any
electrical noise that may be present on the analog input signals. This filter works both in PI mode and
standard speed control mode. It should be set to the lowest value that yields acceptable performance, as
setting it too high may cause the drive to react too slowly to signal changes. The range of adjustment is
1 to 1000, which actually corresponds to 0.01 to 10.0 seconds.
P75 SLEEP THRESHOLD
The PI option has a Sleep Mode function that allows the drive to cease operation when system demand
falls below a preset level. This is to prevent the motor from operating at low speeds for long periods of
time.
When the commanded speed falls below the SLEEP THRESHOLD setting for the defined SLEEP
DELAY time (see P76 on the next page), the drive will “go to sleep” and the motor will stop. The drive
will remain “sleeping” until it is commanded to operate at a speed that is 2 Hz above the SLEEP
THRESHOLD, at which point it will “wake up” and ramp the motor up to the commanded speed.
NOTE 1: While the drive is in Sleep Mode, the display will read”SLP”.
NOTE 2: If the drive’s commanded speed goes below the SLEEP THRESHOLD, the SLEEP DELAY
timer will start to count down. If the commanded speed equals or exceeds the SLEEP THRESHOLD
before the SLEEP DELAY times out, the SLEEP DELAY timer will reset.
NOTE 3: If the drive is in a Stop state, and the commanded speed is below the SLEEP THRESHOLD,
the drive will immediately go to sleep upon a Start command, bypassing the SLEEP DELAY.
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