8-49
8-6 Extended Parameters
OMNUC G5-SERIES AC SERVOMOTOR AND SERVO DRIVE USER'S MANUAL
8
Parameter Details
The dynamic brake is designed only for emergency stopping. Design the system to stop within
about ten minutes after the dynamic brake operates.
Explanation of Set Values
If an alarm occurs when servo is turned OFF, the operation will be based on the Stop Selection for
Alarm Detection (Pn510). Additionally, if the main power supply is turned OFF when servo is OFF,
it will be based on the Stop Selection with Main Power Supply OFF (Pn507).
The dynamic brake is designed only for emergency stopping. Design the system to stop within
about ten minutes after the dynamic brake operates.
*1. Emergency stop refers to an immediate stop operation applying control while servo is still ON and
stopping the operation immediately.
At that time, the torque command value is restricted by the Immediate Stop Torque (Pn511).
*2. If the position command is given or the motor runs continuously when servo is turned OFF, the
position error accumulates and Alarm 24.0, "error counter overflow," may occur. In addition, if servo
is turned ON when the position error or external encoder error is a large value, the motor may operate
abruptly to perform a control operation to bring the error to 0. Take sufficient care when using while
holding the position error or external encoder error.
*3. Decelerating is the time between when the motor is running and when the motor speed reaches 30 r/
min or less. Once the motor reaches 30 r/min or less and moves to the after-stop status, subsequent
operation is based on the after-stop status regardless of the motor speed.
*4. The position error or external encoder error will always be cleared to 0.
Pn506
Stop Selection with Servo OFF
Setting
range
0 to 9 Unit −
Default
setting
0
Power OFF
and ON
−
All
Set
value
Explanation
During deceleration *
3
After stopping Error counter
0 Dynamic brake operation Dynamic brake operation Clear *
4
1 Free-run Dynamic brake operation Clear *
4
2 Dynamic brake operation Servo free Clear *
4
3 Free-run Servo free Clear *
4
4 Dynamic brake operation Dynamic brake operation Hold *
2
5 Free-run Dynamic brake operation Hold *
2
6 Dynamic brake operation Servo free Hold *
2
7 Free-run Servo free Hold *
2
8 Immediate stop *
1
Dynamic brake operation Clear *
4
9 Immediate stop *
1
Servo free Clear *
4
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