Motor Brake Parameters; Vfd Control Modes - Hitachi WJ200 Instruction Manual

The motor brake parameters ca be adjusted based on the application needs.

Brake wait time for release – After the Brake Release Frequency Setting is reached, the inverter waits for the braking wait time

(b121)

Brake wait time for acceleration – The inverter waits for the Brake Wait Time for Acceleration (b122), and then starts accelerating

the motor up to the set acceleration frequency.

Brake wait time for stopping – Once the brake release signal is turned off, the inverter waits for the Brake Wait Time for Stopping

(b123), and then starts decelerating the motor down to 0Hz.

Function

Brake release frequency

Brake set frequency

Brake wait time for release

Brake wait time for acceleration

Brake wait time for stopping

AL output relay output function

The VFD control mode is pre-set from Detroit Hoist and should not be changed unless directed to by a Detroit Hoist employee.

Constant torque is typically used for all bridge motions and load brake hoist motions. Constant torque can be configured for manual

torque boost or automatic torque boost. The default from Detroit Hoist is manual torque boost. Automatic torque boost uses the

manual torque boost parameters as a start value and then adjusts based on the voltage compensation gain and slip compensation

gain.

Sensorless vector is typically used for hoist trolleys to provide higher torque but can also be used for all motions if configured

correctly.

Function

Supported VFD Control Modes

Parameter

b125

b127

b121

b122

b123

C026

Parameter

A044

Value

2.50 Hz

2.50 Hz

0.00 s

0.00 s

0.00 s

19: BRK

Value

00 = Constant Torque

03 = Sensorless Vector

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