2
Preparation
Servo-on signal accept timing on power-up
Control
power supply
(L1C,L2C)
Internal control
power supply
Action of
driver CPU
Main
power supply
(L1,L2,L3)
Servo-Ready output
(S-RDY)
Servo-ON input
(SRV-ON)
Dynamic
brake
Motor
energization
External brake
release output
(BRK-OFF)
Position/Speed/
Torque command
• The above chart shows the timing from AC power-ON to command input.
• Activate the external command input according to the above timing chart.
Caution
*1. In this term Servo-ON input (SRV-ON) turns ON as a hard ware, but operation com-
mand can not be received.
*2. S-RDY output will turn on when both conditions are met, initialization of micro com-
puter has been completed and the main power has been turned on.
*3. After Internal control power supply , protective functions are active from approx. 1.5
sec after the start of initializing microcomputer. Please set the signals, especially for
protective function, for example over-travel inhibit input (POT, NOT) or external scale
input, so as to decide their logic until this term.
The lapse time can be changed with Pr6.18 Wait time after power-up.
2-30
10. Timing Chart
Timing on power-up
OFF
approx.100 to 300 ms
OFF
approx.2s
approx.1.5s
reset
(initialization)
0s or longer
OFF
output Tr OFF
input coupler OFF
not-energized
output Tr OFF (brake engaged)
No command entry
ON
established
*3
usually operation
ON
*2
10ms or longer
10ms or longer
*2
0ms or longer
engaged
output Tr ON
input coupler ON
approx.2ms
released
approx.60ms
energized
approx.4ms
ON
(brake released)
100ms or longer
*1
Command
entry
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