Allen-Bradley PowerFlex 755 Reference Manual

CIP Axis Attributes
Chapter 4
Rockwell Automation Publication MOTION-RM003I-EN-P - February 2018 437
Mechanical Brake Control
Usage Access Data
Type
Default Min Max Semantics of Values
Optional - D Set/SSV USINT 0 - - Enumeration
0 = Automatic
1 = Brake Release
2...225 = Reserved
The Mechanical Brake Control attribute governs the operation of the drive's
Mechanical Brake Output that controls the mechanical brake mechanism. When
set to Automatic, the Mechanical Brake is under the control of the axis state
machine. The sequencing for the brake is described in detail by the Mechanical
Brake Engage Delay and Mechanical Brake Release Delay attributes. When set to
Brake Release, the brake is unconditionally released, and no longer under the
control of the axis state machine.
Mechanical Brake Release Delay
Usage Access Data
Type
Default Min Max Semantics of Values
Optional - D Set/SSV REAL 0
FD
0 10
3
Seconds
When enabling the axis, the Mechanical Brake Release Delay value determines the
amount of time the device will delay transition from the Starting state to the
Running or Testing states. This delay prevents any commanded motion of the
motion axis until the external mechanical brake has had enough time to disengage.
If supported, a Torque Proving operation is included in this sequence prior to
releasing the brake.
Enable Sequence:
1. Switch to Starting state.
2. Activate Resistive Brake contactor to connect motor to inverter power
structure.
3. Wait for "Resistive Brake Contact Delay" while Resistive Brake contacts
close.
4. Enable inverter power structure.
5. Perform (optional) Torque Proving operation to verify motor control of
load.
6. Activate Mechanical Brake output to release brake.

Allen-Bradley PowerFlex 755 Specifications

General

Category	AC Drive
Amperage	2.2…1470 A
Output Voltage	0 to Input Voltage
Output Current	2.2…1470 A
Enclosure	IP20, IP30, IP54
Communications	EtherNet/IP, ControlNet, DeviceNet
I/O	Digital, Analog, Encoder, Relay
Safety	Safe Speed Monitor
Protection Features	Overcurrent, Overvoltage, Undervoltage, Overload, Short Circuit, Ground Fault, Overtemperature
Operating Temperature	-10°C to 50°C (14°F to 122°F)
Storage Temperature	-40°C to 70°C (-40°F to 158°F)
Humidity	5…95% noncondensing
Altitude	Up to 1000m (3300ft) without derating
Voltage	200-240V AC, 380-480V AC, 500-600V AC, 690V AC
Input Voltage	200-240V AC, 380-480V AC, 500-600V AC, 690V AC
Control Method	Sensorless Vector