Inverter Application Precautions
10-
7
10
Options
Terminals B1, B2,
,
1,
2,
3 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 Inverter.
Installation in Enclosures
Either install the Inverter in a clean location not subject to oil mist, air-bourne matter, dust, and other contam-
inants, or install the Inverter in a completely enclosed panel. Provide cooling measures and sufficient panel
space so that the temperature surrounding the Inverter does not go beyond the allowable temperature. Do not
install the Inverter on wood or other combustible materials.
Installation Direction
Mount the Inverter vertically to a wall or other horizontal surface.
Settings
Observe the following precautions when making settings for an Inverter.
Upper Limits
The Digital Operator can be used to set high-speed operation up to a maximum of 400 Hz (depends on the car-
rier frequency). Incorrect settings can be dangerous. Use the maximum frequency setting functions to set
upper limits. (The maximum output frequency is factory-set to 60 Hz.)
DC Injection Braking
The motor can overheat if the DC injection braking voltage or braking time is set to a large value.
Acceleration/Deceleration Times
The motor's acceleration and deceleration times are determined by the torque generated by the motor, the load
torque, and the load's inertial moment (GD
2
/4). If the stall prevention functions are activated during accelera-
tion 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 Inverter.
