Delta MH300 Series User Manual

Chapter 12 Description of Parameter Settings
MH300
12.1-07-1
07 Special Parameters
 Y
ou can set this parameter during operation.

07-00
Software brake chopper action level
Default: 370.0 / 740.0
Settings 115V / 230V models: 350.0–450.0 V
DC
460V models: 700.0–900.0 V
DC
 Sets the brake transistor level for the DC bus voltage. Choose a suitable brake resistor to achieve
the best deceleration. Refer to Chapter 7 Optional Accessories for information about brake
resistors.

07-01
DC Brake Current Level
Default: 0
Settings
0–100%
 Sets the level of the DC brake current output to the motor during start-up and stop. When you set
the DC brake current percentage, the rated current is regarded as 100%. Start with a low DC
brake current level, and increase it slowly until the proper brake torque is reached. However, to
avoid burning the motor, the DC brake current can NOT exceed the rated current. Therefore, DO
NOT use the DC brake for mechanical retention, otherwise injury or accident may occur.

07-02
DC Brake Time at Start-up
Default: 0.0
Settings 0.0–60.0 sec.
 The motor may continue rotating after the drive stops output due to external forces or the inertia
of the motor itself. If you use the drive with the motor rotating, it may cause motor damage or
trigger drive protection due to over-current. This parameter outputs DC current, generating torque
to force the motor stop to get a stable start before motor operation. This parameter determines
the duration of the DC brake current output to the motor when the drive starts up. Setting this
parameter to 0.0 disables the DC brake at start-up.

07-03
DC Brake Time at STOP
Default: 0.0
Settings
0.0–60.0 sec.
 The motor may continue rotating after the drive stops output due to external forces or the inertia
of the motor itself. This parameter outputs DC current, generating torque to force the drive stop
after the drive stops output to make sure that the motor stops.
 This parameter determines the duration of the DC Brake current output to the motor when braking.
To enable DC brake at STOP, set Pr.00-22 (Stop Method) to 0 (ramp to stop).
 Related parameters:
 Pr.00-22 Stop Method
 Pr.07-04 DC Brake Frequency at Start

Delta MH300 Series Specifications

General

Brand	Delta
Model	MH300 Series
Category	DC Drives
Language	English