Specifications

MCD3000 Series
✭ = factory setting
MG.15.A4.22 - VLT is a registered Danfoss trademark 21
Pro
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rammin
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15 Restart Delay
Value:
0 - 254 Units
✭ 1 Unit (10 seconds)
1 Unit = 10 seconds
Function:
Sets the minimum time between the end of a stop and
the beginning of the next start.
Description of choice:
Set according to process requirements. A setting of
zero achieves the minimum restart delay of 1 second).
During the Restart Delay period the LED to the right of
the MCD3000 numeric display will flash, indicating the
motor cannot be started.
16 Torque Enhancement
Value:
0 - 3
✭ 0 (Off)
0 = Off
1 = Torque boost
2 = Torque control
3 = Torque boost & torque control
Function:
Activates the torque enhancement functions.
Description of choice:
Torque boost provides extra torque at the beginning of
a start. Torque boost can be used for loads that
require high torque to breakaway but then accelerate
freely with lower torque.
ATTENTION
Torque boost results in a fast application of
torque. Ensure that the driven load and drive
chain can handle DOL start torque characteristics.
Torque control provides a more linear application of
torque during start.
17 Soft Stop Profile
Value:
0 - 3
✭ 0 (Standard Mode)
0 = Standard mode
1 = Pump control (mode 1)
2 = Pump control (mode 2)
3 = Pump control (mode 3)
Function:
Selects between soft stop profiles.
Description of choice:
The standard mode is the default soft stop profile and
is appropriate for most installations. In standard mode
motor deceleration is monitored and soft stop
operation is automatically adjusted to optimise
performance.
In addition to the standard mode profile three
specialised pump control modes are available. These
modes provide alternate control algorithms which may
deliver superior performance to the standard mode
depending upon the individual motor and hydraulic
characteristics of the application.
The D.C.Braking function decreases motor
deceleration time by applying a D.C. current to
the motor terminals when a stop command is
given. This function requires that a contactor
(AC1 rated) be wired between output terminals
T2 & T3 as shown in the electrical schematic
below and that the following MCD3000
parameters be adjusted.
• Par 18. D.C.Brake - Brake Time
• Par 19. D.C.Brake - Brake Torque
• Par 38. Relay C - Function Assignment.
The MCD3000 power modules will be
damaged if the D.C.Brake contactor is
closed when the D.C.Brake function is not
operating. Ensure the D.C.Brake
contactor is controlled by Relay Output C and that
Par. 38 Relay C - Function Assignment is set for
D.C.Braking Contactor Control
The MCD3000 power modules will be
damaged if the D.C.Brake contactor is
incorrectly connected between T1-T2 or
T1-T3.