Lenze EDB9300UES - Manual (Page 109)

Operation and Software
104 BA8230
Motor potentiometer n-min
This parameter determines the minimum speed of the 8230 frequency inverter when
controlled through the motor potentiometer function. If there should be a change in the
ratio between "standard frequency" and "no. of pairs of poles", the parameter setting
is affected proportionally. If a value greater than the “motor potentiometer n-max” is
set, this is reset to the value of “motor potentiometer n-min”.
Adjustment range: 0 ... 2 * "standard frequency" * 60/no. of pairs of poles
As supplied: 0 min
-1
Jogging demand
This parameter determines the jogging speed. It is preset by driving terminal 16
(digital input 3 if the parameters are set accordingly). The type data module initialises
this at 0.01 * “standard frequency" * 60/no. of pairs of poles. If the ratio between
"standard frequency" and "no. of pairs of poles" should change, the parameter setting
is adjusted proportionally.
Adjustment range: 0 ... 0.1 * "standard frequency" * 60/no. of pairs of poles
As supplied: 30 min
-1
Fixed speed 1...4
Up to 4 fixed demands can be stored in the 8230 frequency inverter with these
parameters and selected through digital inputs 1 and 2 (digital input 1 terminal :15).
For this, the signal source selected through terminal 6 ("AUTO demand” or “MANUAL
demand”) must be set to "Fixed speed" and the appropriate function assigned to
terminals :15 and :16 (see digital input 1 terminal :14, digital input 2 terminal :15). If
the ratio between "standard frequency" and "no. of pairs of poles" should change, the
parameter setting is adjusted in proportion.
Adjustment range: 0 ... 2 * "standard frequency" * 60/no. of pairs of poles
As supplied: 150, 300, 450, 600 min -1
Skip speed 1...3
Bandwidth 1...3
In the event of mechanical resonance in the machine it can be beneficial to skip
certain speed ranges when stationary.
These speeds are avoided using parameter-adjustable skip speeds. Three skip speed
parameters are available. The relevant bandwidth determines the skip range around
the actual skip speeds.
If the bandwidth is to zero, no speeds are skipped.
If the ratio between "standard frequency" and "no. of pairs of poles" should change,
the parameter settings are adjusted proportionally.
Skip speeds:
Adjustment range:
0 ... 2 * "standard frequency" * 60/no. of pairs of poles
As supplied: 750, 1500, 3000 min
-1
Bandwidths:
Adjustment range:
0 ... 0.1 * "motor rated frequency" * 60/no. of pairs of
poles
As supplied: 0.0 min -1
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