Accelnet & Stepnet Plus Panels User Guide
16-01339 Rev 07
3.8 B
RAKE
O
PERATION
B
RAKE
O
UTPUTS
Many control systems employ a brake to hold an axis when the drive is disabled.
Accelnet & Stepnet
Plus
Panel
drives have digital outputs designed specifically for brake control. Unlike the other outputs, these brake
outputs have internal fly-back diodes connected to +24 Vdc input. By eliminating the need to connect into the
drive control connector, the brake outputs simplify wiring when the brake wires are in the power cable of the
motor. Non-brake outputs require external fly-back diodes if they are used for brake control.
B
RAKE
/S
TOP
S
EQUENCES
Disabling the drive by a hardware or software command starts the following sequence of events
The motor begins to decelerate (at Abort Deceleration rate in position mode or Fast Stop Ramp rate in velocity
mode). At the same time, the Brake/Stop Delay Time count begins. This allows the drive to slow the motor
before applying the brake.
When the motor slows to Brake/Stop Activation Velocity OR the Brake/Stop Delay Time expires, the brake
output activates and PWM Delay Brake/Stop Response Time count begins.
When response time has passed, the drive’s output stages are disabled. This delay ensures the brake has
time to lock in before disabling the power section.
1-Axis Drives
2-Axis Drives
