Omron OMNUC G User Manual page 247

Operation timing during alarms (during Servo ON)
OFF
Alarm
ON
ON
Servomotor
OFF
ON
Dynamic Brake
Relay
OFF
ON
Servo Ready
Output (READY)
OFF
ON
Alarm Output (ALM)
OFF
ON
Brake Interlock
Output (BKIR) *2
OFF
Rotation Speed A
Brake Interlock
Output (BKIR) Rotation Speed B
*1. The operation of the dynamic brake during alarms depends on the Stop Selection with Servo OFF (Pn069).
*2. t1 is either the Brake Time during Operation (Pn06B) setting or the time for the Servomotor speed to drop below
approximately 30 r/min, whichever occurs first. t1 becomes 0 when an alarm occurs while the motor is stopped.
Note 1. The Servomotor will not change to Servo ON until it stops even if the Servo ON input is turned ON while
it is decelerating. The Brake Interlock (BKIR) signal is used by assigning it to the general purpose outputs
on CN1.
Note 2. The above operation timing is applied because of the Missing Phase alarm and Main Circuit Low Voltage
alarm when the power is turned OFF while the Servomotor is rotating.
Normal
Alarm output
0.5 to 5 ms
Energized Deenergized
Approx. 2 ms
DB Released DB Engaged *1
READY
Alarm
t1
Release
Request
Approx. 30 r/min
BKIR
Release Request
Approx. 30 r/min
Pn06B
Brake Engaged
If the timing for
Pn06B comes first
Brake Engaged
If the timing to
reach 30 r/min comes first
5-5 Brake Interlock
5-14
5