5 Operation
93 SD780 Series Servo Technical Manual
5.7 Timing Sequence
5.7.1 Power Enable ON Timing sequence
Main power
Control power
PWM output
Electromagnetic brake
(/ BK )
Servo enable (/S-ON)
CPU status
There is a delay in the electromagnetic brake operation. The operation time varies depending on the type of brake
.
It is recommended to be more than
100ms to ensure that the electromagnetic brake is completely released when the command is input. This time can be omitted when motor is not braked
.
.
Position/ speed/
torque command input
2
s
*
1
Control circuit power up
Main circuit power up
normal operation
Servo no output
Release
brake
Motor holding brake
Servo output
Invalid command input
Command
input valid
Action time
*
1
initialization
Servo preparation (/S-RDY)
250
ms
invalid
valid
40
ms
Motor holding
brake
valid
invalid