Intelligent Functions And Parameters; Braking - Hitachi L200 Series Instruction Manual

Intelligent Functions and Parameters

Much of this manual is devoted to describing
how to use inverter functions and how to config-
ure inverter parameters. The inverter is micro-
processor-controlled, and has many independent
functions. The microprocessor has an on-board
EEPROM for parameter storage. The inverter's
front panel keypad provides access to all
functions and parameters, which you can access
through other devices as well. The general name
for all these devices is the digital operator, or
digital operator panel. Chapter 2 will show you
how to get a motor running, using a minimal set
of function commands or configuring parame-
ters.
The optional read/write programmer will let you
read and write inverter EEPROM contents from
the programmer. This feature is particularly
useful for OEMs who need to duplicate a particu-
lar inverter's settings in many other inverters in
assembly-line fashion.

Braking

In general, braking is a force that attempts to slow or stop motor rotation. So it is associ-
ated with motor deceleration, but may also occur even when the load attempts to drive
the motor faster than the desired speed (overhauling). If you need the motor and load to
decelerate quicker than their natural deceleration during coasting, we recommend
installing an optional dynamic braking unit. See
"Dynamic Braking" on page 5–5
braking units. The L200 inverter sends excess motor energy into a resistor in the
dynamic braking unit to slow the motor and load. For loads that continuously overhaul
the motor for extended periods of time, the L200 may not be suitable (contact your
Hitachi distributor). For loads that continuously overhaul the motor for extended periods
of time, the L200 may not be suitable (contact your Hitachi distributor).
The inverter parameters include acceleration and deceleration, which you can set to
match the needs of the application. For a particular inverter, motor, and load, there will
be a range of practically achievable accelerations and decelerations.
"Introduction" on page 5–2
for more information on the BRD–E2 and BRD–EZ2
1–15
L200 Inverter
and