Panasonic A4P Series Dynamic Brake, Sequence at main Driving condition Power-off SV.Pr67

Dynamic Brake

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 becomes a dynamo when driven externally, and shorting current runs while this dynamic brake is activated and might cause smoking or fire.

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 running.

(Over-current protection (error code No. 14) may be activated when the dynamic brake circuit inside the F-frame driver 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.

In the above cases from 1) to 3), you can select either activation of the dynamic brake or making the motor free-run during deceleration or after the stop, with parameter.

Note that when the control power is off, the dynamic brake will be kept activated.

1)Setup of driving condition from deceleration to after stop by main power-off (SV.Pr67)

Sequence at main ￿		Driving condition
power-off (SV.Pr67)		during deceleration	after stalling
	Setup value of SV.Pr67
	0
		D B		D B
	1
		Free-run		D B
	2
		D B		Free-run
	3
		Free-run		Free-run
4		D B		D B
5		Free-run		D B
6		D B		Free-run
7		Free-run		Free-run
8		Emergency stop		D B
9		Emergency stop		Free-run

Contents of ￿ deviation ￿ counter

Clear

Clear

Clear

Clear

Hold

Hold

Hold

Hold

Clear

Clear

Torque limit value at emergency stop will be that of SV.Pr6E (Emergency stop torque set up) when the setup value is 8 or 9.

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