E. Jog Speed (JOG) –
Sets “jog” speed of the motor. The JOG
trimpot is factory set for 15% of motor base speed, as shown
in Figure 27 . For a higher jog setting, rotate the trimpot
clockwise. For a lower jog setting, rotate the trimpot counter-
clockwise.
Note:
The Jog feature requires installation of the Run-Stop-Jog
Switch assembly (P/N 9340).
F. Current Limit (CL) –
Sets current limit (overload), which limits
the maximum current to the motor. The current limit set point is
established by the setting of jumper J2 and the setting of the CL
trimpot. The CL trimpot is factory set for 150% of J2 range set-
ting, as shown in Figure 28. For a higher current limit setting,
rotate the trimpot clockwise. For a lower current limit setting,
rotate the trimpot counterclockwise. Two modes of current lim-
iting operation are provided: Non-Timed Current Limit (NTCL)
and Timed Current Limit (TCL). See Section IVC, on page 11.
CAUTION!
Adjusting the CL above 150% of motor rating can
cause overheating and demagnetization of some PM motors.
Consult the motor manufacturer. Do not leave the motor in a
locked condition for more than a few seconds since armature
damage may occur.
G. Timed Current Limit (TCL) –
Sets the time for the control to
shut down after being in current limit (provides electronic motor
overload protection). The TCL trimpot is factory set for 5 sec-
onds, as shown in Figue 29. For increased TCL time, rotate the
trimpot clockwise. For decreased TCL time, rotate the trimpot
counterclockwise. If the control remains in CL for a predeter-
mined amount of time (set by the TCL trimpot and if jumper J3
is in the “TCL” position), the control will shut down. To reset the
control after it has shut down, momentarily set the start/stop
switch to the “START” position or disconnect and then recon-
nect the AC line.
Warning!
When the control shuts down in TCL, the
AC line voltage is still present in the control.
H. Non-Timed Current Limit (NTCL) –
When jumper J3 is set to
“NTCL” position and an overload condition exists, the control
will remain in current limit and will not shut down.
I. IR Compensation (IR) –
Sets the amount of compensating
voltage required to keep the motor speed constant under
changing loads. The IR trimpot is factory set for 4 Volts (for
90 Volt DC output) and 8 Volts (for 180 Volt DC output), as
shwon in Figue 30. For higher compensating voltage, rotate the trimpot clockwise. For
lower compensating voltage, rotate the trimpot counterclockwise.
Note:
If the IR compensation is set too high, unstable (oscillatory) operation will result. If
the control is used with a tach-generator, the IR trimpot should be set fully counterclockwise.
IX. DIAGNOSTIC LEDs
The KBPW-240D is designed with LEDs mounted on the front cover to display the control’s
operational status.
A. Power On (ON) –
The ON LED will illuminate green when the AC line is applied to the
control.
Note:
When removing power to the control, the POWER LED will remain illuminated for a
few seconds until the DC bus voltage discharges.
14
!
0
50
25
15
% Base Speed
FIGURE 27 – JOG
TRIMPOT RANGE
0
200
100
150
% Range Setting
FIGURE 28 – CL
TRIMPOT RANGE
0.5
10
5
Seconds
FIGURE 29 – TCL
TRIMPOT RANGE
0
15, 30
7.5, 15
4, 8
Volts
FIGURE 30 – IR
TRIMPOT RANGE
Summary of Contents for 8401
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