134 Functional Description CG Drives & Automation, 01-5326-01r5
Release torque [33I]
The Brake Release Time [33C] sets the time the AC drive
delays before ramping up to whatever final speed reference
value is selected, to allow the brake to be fully opened.
During this time a holding torque to prevent roll-back of the
load can be activated. The parameter Release Torque [33I] is
used for this purpose.
The release torque initiates the torque reference from the
speed controller during the Brake Release Time [33C]. The
release torque defines a minimum level of release (holding)
torque. The set release torque is internally overruled if the
actual required holding torque measured at the previous
closing of brake is higher.
The release torque is set with sign in order to define the
holding torque direction.
Communication information
Fig. 104 Principle of Brake operation for fault during run and during stop
33I Release Trq
Default: 0%
Range -400% to 400%
Modbus Instance no/DeviceNet no: 43118
Profibus slot/index 169/22
EtherCAT and CANopen index (hex) 4c2e
Profinet IO index 19502
Fieldbus format Long, 1=1%
Modbus format EInt
Note! Function is deactivated if set to 0%.
Note! Release Torque [33I] has priority over torque
reference initialization by Release Speed [33D].
Brake warning
Brake Trip
Brake acknowledge
Brake relay
Speed>0
Torque
Running
Start
During run
During stop
Brake
<33H
33H
<33H
Brake
Brake wait
time
Brake engage
time
33F
33E
33C
33C
release time
release time
Brake Fault trip time
*
**
* Memorized load torque level, if function activated with parameter [33I] Release Torque.
** Time for operator to set down the load.
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