Yaskawa Sigma Mini User Manual

Page 28

1.3Connection and Wiring

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Designing the Power ON Sequence

Observe the following precautions when designing the power ON sequence.

• Design a power ON sequence so that the power is turned OFF when a servo alarm signal is

output. (See the previous circuit diagram.)

• Hold down the power ON push-button for at least two seconds. The Servopack outputs a

servo alarm signal for approximately two seconds or less when the power is turned ON. This
operation is required to initialize the Servopack.

Servo alarm (ALM) output signal

Power supply

Wiring Precautions

• After turning the power OFF, do not touch the power terminals for 5 minutes. Residual volt-

age may remain in the Servopack.

• Avoid frequently turning the power ON and OFF. The Servopack has a capacitor in the pow-

er supply, so a high charging current flows when the power is turned ON. Therefore, fre-
quently turning the power ON and OFF causes the main power devices (such as capacitors
and fuses) to deteriorate, resulting in unexpected problems.