(4) Servo alarm output [ALM]
If any fault detection circuits in Table 4.2 functions, the power drive circuit in the
Servopack is turned off, 7-segment LEDs indicate the operation status and a servo
alarm signal is output.
(5) Protective circuit operation
An alarm signal indicates some fault. Check the cause and fix the problem, and restart
the operation. Before checking the cause, turn off the main power supply to avoid
danger. Apply the sequence so that the alarm signal turns off only themain circuit
((_), (_) , (_)), as shown in Figs. 5.17 and 5.18. This allows rapid reaction ill the
event of a malfunction.
If the power to the control circuit ((_,(_)) is simultaneously turned off, this
also turns off the LED in the Servopack indicating the cause of the alarm signal.
CAUTION
When an alarm signal cuts off only the main circdit, turn off servo ON_(SVON)
signal before supplying power to the main circuit to resume the operation.
(6) Resetting servo alarm
To reset the servo alarm, turn on alarm reset signal RST (or serial communication
command _ ).
If _,. is on (e.g., ServopaEk is overloaded), it takes a few minutes • to reset
the alarm'condition.
i - 51--
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