Yaskawa Matrix Converter - Manual (Page 378)

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„ Emergency Stop
Although the protective functions in the MxC will trigger a Stop Command when a fault occurs, the motor will
not stop immediately. Always provide mechanical stop and protection mechanisms on equipment requiring an
Emergency Stop.
„ Options
Terminals p1, n1, r2, s2, and t2 are for connecting only the options specifically provided by Yaskawa. Never
connect any other devices to these terminals.
‹ Installation
Observe the following precautions when installing an MxC.
„ Using Enclosures
Either install the MxC in a clean location free of oil mist, air-bourne matter, dust, and other contaminants, or
install the MxC in a completely enclosed panel. Provide cooling measures and sufficient panel space so that
the temperature surrounding the MxC does not rise above allowable limits. Do not install the MxC on a wood
surface or to any other combustible materials.
„ Installation Directions
Mount the MxC so that it sits upright.
‹ Settings
Observe the following precautions when making settings for an MxC.
„ Upper Limits
The digital operator can be used to set high-speed operation up to a maximum of 120 Hz. Incorrect settings
can be dangerous. Use the maximum frequency setting functions to set upper limits. The maximum output fre-
quency is factory-set to 60 Hz.
„ DC Injection Braking
The motor can overheat if the DC Injection Braking voltage or braking time is set too high.
„ Acceleration/Deceleration Times
The acceleration and deceleration times for the motor are determined by the motor generated torque, the load
torque, and the inertial moment of the load (GD
2 /4). If the stall prevention functions are activated during
acceleration or deceleration, increase the acceleration or deceleration time. The stall prevention functions will
increase the acceleration or deceleration time by the amount of time the stall prevention function is active.
To reduce the acceleration or deceleration times, increase the capacity of the motor and MxC.