Yaskawa Sigma-5 Large Capacity Users Manual: Design and Maintenance-Rotary Motors-Analog Voltage and Pulse Train Reference - Manual (Page 7)

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Safety Precautions
These safety precautions are very important. Read them before performing any procedures such as checking
products on delivery, storage and transportation, installation, wiring, operation and inspection, or disposal. Be
sure to always observe these precautions thoroughly.
WARNING
• Never touch any rotating motor parts while the motor is running.
Failure to observe this warning may result in injury.
• Before starting operation with a machine connected, make sure that an emergency stop can be
applied at any time.
Failure to observe this warning may result in injury or damage to the product.
• Never touch the inside of the SERVOPACKs and the converters.
Failure to observe this warning may result in electric shock.
• Do not remove the front cover of the power supply terminals while the power is ON.
Failure to observe this warning may result in electric shock.
• Immediately after the power is turned OFF or after a voltage resistance test, do not touch terminals
while the CHARGE lamp is ON. For details on the charging time of the main circuit’s capacitor, refer
to 3.1.5 Discharging Time of the Main Circuit’s Capacitor.
Residual voltage may cause electric shock.
• Follow the procedures and instructions provided in this manual for trial operation.
Failure to do so may result not only in faulty operation and damage to equipment, but also in personal injury.
• The output range of the rotational serial data for the absolute position detecting system used for Σ-V large-
capacity servo drives is different from that of earlier systems for 12-bit and 15-bit encoders. As a result, the infi-
nite-length positioning system of the Σ servo drives must be changed for use with Σ-V large-capacity servo
drives. Be sure to make the system modifications.
• The multi-turn limit value need not be changed except for special applications.
Changing it inappropriately or unintentionally can be dangerous.
• If the Multi-turn Limit Disagreement alarm occurs, check the setting of parameter Pn205 in the SERVOPACK to
be sure that it is correct.
If Fn013 is executed when an incorrect value is set in Pn205, an incorrect value will be set in the encoder. The
alarm will disappear even if an incorrect value is set, but incorrect positions will be detected, resulting in a
dangerous situation where the machine will move to unexpected positions.
• Do not remove the front cover, cables, connectors, or optional items from the front of the SERVO-
PACK and the converter while the power is ON.
Failure to observe this warning may result in electric shock or damage to the product.
• Do not damage, press, exert excessive force on, or place heavy objects on the cables.
Failure to observe this warning may result in electric shock, stopping operation of the product, or fire.
• Do not modify the product.
Failure to observe this warning may result in injury, fire, or damage to the product.
• Provide an appropriate braking device on the machine side to ensure safety. The holding brake on
a servomotor with a brake is not a braking device for ensuring safety.
Failure to observe this warning may result in injury.
• Do not come close to the machine immediately after resetting a momentary power loss. The
machine may restart unexpectedly. Take appropriate measures to ensure safety against an unex-
pected restart.
Failure to observe this warning may result in injury.
• Do not wire the regenerative resistor unit incorrectly. Never short-circuit the B1 and B2 terminals.
Failure to observe this warning may result in fire or damage to the product.
• Connect the ground terminal according to local electrical codes (100 Ω or less for a SERVOPACK
and a converter with a 200 V power supply. 10 Ω or less for a SERVOPACK and a converter with
400 V power supply).
Improper grounding may result in electric shock or fire.
• Be sure to connect the servomotor’s built-in thermostat to the host controller or to the main circuit
magnetic contactor’s operation circuit.
Failure to observe this warning may result in injury, fire, or damage to the product.