LEESON Micro Series Compact Inverters - Manual (Page 54)

1-4 SPEED #1-#4 (PRESET SPEEDS #1, #2, #3, AND #4)
PRESET SPEEDS are only active when the drive is in AUTO mode, and are activated via contact closures
between terminal TB-2 and terminals TB-13A, TB-13B, and TB-13C . These terminals must be
programmed as preset speed selects using Parameters 47 - 49: TB13A, TB13B, and TB13C .
The preset speeds can only be set to values that are within the operating range defined by the minimum and
maximum frequency (see Parameters: 10 - MIN FREQ, and 11 - MAX FREQ).
The following table shows how each preset speed is selected using the TB-13 terminals . The terms OPEN
and CLOSED refer to the state of the TB-13 terminal relative to TB-2 .
NOTE: SPEED #4 is selected if any two of the three TB-13 terminals are closed to TB-2
5,6 SKIP #1 & #2 (SKIP SPEED #1 & #2)
7 BAND WID (SKIP BANDWIDTH)
These parameters are used to prevent the drive from operating continuously at critical speeds, or
frequencies, that cause excessive mechanical vibration of the driven equipment. The SKIP SPEEDS
(Parameters 5 and 6) and the SKIP BANDWIDTH (Parameter 7) are used to define up to two speed
avoidance ranges . The SKIP SPEED settings define the starting point of the speed range that is to be
avoided, and the SKIP BANDWIDTH setting defines how far the speed range extends beyond SKIP
SPEED .
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PRESET SPEED ACTIVATION
SPEED # TB-13A TB13B TB-13C
1 CLOSED OPEN OPEN
2 OPEN CLOSED OPEN
3 OPEN OPEN CLOSED
4 CLOSED CLOSED OPEN
CLOSED OPEN CLOSED
OPEN CLOSED CLOSED