Jog Operation - Danfoss VLT MCD 600 Operating Manual

VLT® Soft Starter MCD 600
Operating Guide
1
1/L1 3/L2
2
2/T1 4/T2
K2
M
Illustration 39: Connection Diagram
1 Three-phase supply
2 Motor terminals
3 Programmable input A (set=Reverse direction)
4 Relay output A (set=Reversing contactor)

9.12 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.
Jog is only available when the soft starter is controlled via the digital inputs (parameter 1-1 Command Source set to Digital Input). To
operate in jog, set a programmable input to jog (see parameter 7-1 Input A Function for details). Ensure that the input is closed when
the start signal is applied.
REDUCED MOTOR COOLING
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.
-
Install a motor thermistor or allow sufficient restart delay (parameter 5-16 Restart Delay).
The maximum available torque for jog forward is approximately 50–75% of motor FLT depending on the motor. When the motor is
jogged in reverse, the torque is approximately 25–50% of FLT.
Parameter 2-8 Jog Torque and parameter 3-10 Jog Torque-2 control how much of the maximum available jog torque the soft starter
applies to the motor.
Torque settings above 50% may cause increased shaft vibration.
Danfoss A/S © 2020.12
A1 A2 A3
5/L3 COM+
6/T3
4
23 22 21
5
K2 K1
K1
N O T I C E
N O T I C E
3
DI-A
5 K1/K2 coil supply
K1 Forward run contactor
K2 Reversing contactor
Operation
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