Dynamic Brake - Panasonic MINAS A5-series Operating Instructions Manual

2
Preparation
This driver is equipped with a dynamic brake for emergency stop.
Pay a special attention to the followings.
Caution
1. Dynamic brake is only for emergency stop.
Do not start/stop the motor by turning on/off the Servo-ON signal
(SRV-ON).
Or it may damage the dynamic brake circuit of the driver.
The motor will operate as a generator when externally driven.
Short-circuit current will flow during dynamic braking regardless of
condition of power supply (ON/OFF), causing the driver to generate
smoke or fire if the motor is continuously driven externally.
2. Dynamic brake is a short-duration rating, and designed for only emergency stop. Allow
approx. 3 minutes pause when the dynamic brake is activated during high-speed run-
ning.
(Over-current protection (Err.14.0) may be activated when the dynamic brake circuit
inside the F-frame amplifier has overheated.)
• You can activate the dynamic brake in the following cases.
1) When the main power is turned off
2) At Servo-OFF
3) When one of the protective function is activated.
4) When over-travel inhibit input (NOT, POT) of connector X4 is activated
In the above cases from 1) to 4), you can select either activation of the dynamic
brake or making the motor free-run during deceleration or after the stop, with pa-
rameter.
Note that when the control power is off, the dynamic brake will be kept activated.
Related page
• P.3-38 "Inputs and outputs on connector X4"
• P.4-44... "Details of Parameter"
• P.6-5 "Protective Function"
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12. Dynamic Brake
Outline