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7-17
7 Applied Functions
G5 Series AC Servo Drives With Built-in EtherCAT Communications, Linear Motor Type
7-5 B
ra
ke Interloc
k
7
7-5
-2 Oper
ation Timing
Based on these operation timings, regenerative energy is produced if the motor movement stops
abnormally. Accordingly, repeated operation cannot be performed. Provide a wait time of at least 10
minutes for the motor to cool down.
*1
The servo does not turn ON until the motor speed drops to 3439 hex set value or below. If a Servo ON is commanded
during motor movement, the Command Warning (Warning No. B1 hex) will occur. The Servo ON command is ignored.
*2
The operation of the dynamic brake when the servo is OFF depends on the setting of the Disable operation option code
(605C hex).
*3
The Brake Interlock output (BKIR) signal is output when a release request command is received from Servo controls or
from EtherCAT communications. In the above example, there is no release request command from EtherCAT
communications. The BKIR signal is assigned to the general-purpose output (CN1).
*4
“
t1
”
is the period until the value becomes lower than the set value on the Brake Timing During Operation (3438 hex) or the
Brake Threshold Speed During Operation (3439 hex), whichever is shorter.
Note
Even when the Servo ON Input is turned ON again while the motor is decelerating, the system does not enter the servo
ON state until the motor stops.
Servo ON/OFF Operation Timing When Motor Is Moving
Servo ON/OFF
ON
OFF
Dynamic brake
Released
Engaged
Motor power supply
ON
OFF
Brake interlock output
(BKlR)
*3
ON
OFF
*1
1 to 5 ms
Approx. 4 ms
3438 hex
Approx. 60 ms
Servo OFF
Servo OFF
Servo ON
*1
DB engaged
DB engaged
*2
DB released
Power supply
No power supply
No power supply
*2
Release request
t1
*4
Motor speed
Servo ON enabled
Approx. +30 mm/s
Value set on 3439 hex
Approx. -30 mm/s
Release request
Value set on 3439 hex
BKIR
When object 3438 hex
set value comes earlier
When object 3439 hex
set value comes earlier
Brake
engaged
Brake
engaged
Brake
operation