Jog Operation - Danfoss vlt soft starter mcd 500 Operating Manual

Product Features
NOTICE
When using DC brake:
1. Connect the mains supply to the soft starter
(input terminals L1, L2, L3) in positive phase
sequence.
2. Set parameter 2-1 Phase Sequence to Positive
only.
NOTICE
For loads which may vary between braking cycles, install
5 5
a zero-speed sensor to ensure that the soft starter ends
DC braking when the motor stops. This installation
avoids unnecessary heating of the motor.
For more information on using the MCD 500 with an
external speed sensor (for example for applications with
variable load during the braking cycle), see chapter 5.12 DC
Brake with External Zero-speed Sensor.

5.5 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.
The maximum available torque for jog forward is approxi-
mately 50–75% of motor full load torque (FLT) depending
on the motor. When the motor is jogged in reverse, the
torque is approximately 25–50% of FLT. Parameter 15-8 Jog
Torque controls how much of the maximum available jog
torque the soft starter applies to the motor.
NOTICE
Setting parameter 15-8 Jog Torque above 50% may cause
increased shaft vibration.
40
®
VLT Soft Starter MCD 500
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
1 Jog forward
2 Jog reverse
3 Normal operation
Illustration 5.9 Jog Operation
To activate jog operation, use a programmable input
(parameter 3-3 Input A Function).
To stop a jog operation, perform either of the following:
•
•
•
If the jog command is still present, jog recommences at
the end of a restart delay. All other commands except the
ones listed are ignored during jog operation.
NOTICE
Soft start and soft stop are not available during jog
operation. Jog is only available for the primary motor.
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.
•
Danfoss A/S © 05/2016 All rights reserved.
1
2
Remove the jog command.
Press [Off] on the LCP.
Activate Starter disable using the LCP
programmable inputs.
CAUTION
If using jog, install a motor thermistor, or allow
sufficient restart delay (parameter 2-11 Restart
Delay).
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177HA512.10
MG17K602