Digistart D3: User Guide
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Issue: G
7.4 Jog Operation
Jog runs the motor at reduced speed, to allow alignment of the load or to assist servicing. The motor can be jogged in
either forward or reverse direction.
CAUTION
Slow speed running is not intended for continuous operation due to reduced motor cooling.
Jog operation causes the motor to heat faster than the rate calculated by the motor thermal model. If you
are using jog, install a motor thermistor or allow sufficient restart delay (Pr 6G).
NOTE
Soft start and soft stop are not available during jog operation.
Jog is only available for the primary motor.
The maximum available torque for jog forward is approximately 50%~75% of motor full load torque (FLT) depending
on the motor. The torque when the motor is jogged in reverse is approximately 25% to 50% of FLT.
Pr 15E
Jog Torque
controls how much of the maximum available jog torque the soft starter will apply to the motor.
NOTE
Torque settings above 50% may cause increased shaft vibration.
A
vai
labl
e t
or
que
0%
100%
90%
80%
20%
40%
10%
30%
50%
60%
70%
05723.D
1. Motor FLT
2. Jog forward maximum torque
3. Jog reverse maximum torque
To activate jog operation, use either a programmable input (see Pr 3A and 3F, will operate only in Remote Mode) or a
shortcut key (Pr 9J and 9K).
To stop a jog operation, perform one of the following:
•
Remove the jog command.
•
Press the
STOP
button on the keypad.
Jog will recommence at the end of a restart delay if the jog command is still present. All other commands except the
above, will be ignored during jog operation.
7.5 Inside Delta Operation
Adaptive Control, Jog, Brake and PowerThrough functions are not supported with inside delta (six-wire) operation. If
these functions are programmed when the starter is connected inside delta the behaviour is as given below:
Adaptive Control Start
The starter performs a constant current start.
Adaptive Control Stop
The starter performs a TVR soft stop if Pr 2I
Stop Time
is >0 secs. If Pr 2I is set to 0
secs the starter performs a coast to stop.
Jog
The starter issues a warning with the error message Unsupported Option.
Brake
The starter performs a coast to stop.
PowerThrough
The starter trips with the error message Lx-Tx Shorted.
NOTE
When connected in inside delta, current imbalance is the only phase loss protection that is active during
run. Do not disable current imbalance protection (Pr 5C) during inside delta operation.
NOTE
When connecting in inside delta, enter the motor full load current (FLC) for Pr 1A. The Digistart D3 will
automatically detect whether the motor is connected in-line or inside delta and will calculate the correct
inside delta current level.
