Choosing A Programming Device - Hitachi SJ7002 Series Instruction Manual

3–2

Choosing a Programming Device

Choosing a Programming Device

Introduction
Inverter
Programming
Keypads
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Hitachi variable frequency drives (inverters) use the latest electronics technology for getting the
right AC waveform to the motor at the right time. The benefits are many, including energy
savings and higher machine output or productivity. The flexibility required to handle a broad
range of applications has required ever more configurable options and parameters—inverters
are now a complex industrial automation component. And this can make a product seem diffi-
cult to use, but the goal of this chapter is to make this easier for you.
As the powerup test in Chapter 2 demonstrated, you do not have to program very many param-
eters to run the motor. In fact, most applications would benefit only from programming just a
few, specific parameters. This chapter will explain the purpose of each set of parameters, and
help you choose the ones that are important to your application.
If you are developing a new application for the inverter and a motor, finding the right parame-
ters to change is mostly an exercise in optimization. Therefore, it is okay to begin running the
motor with a loosely tuned system. By making specific, individual changes and observing their
effects, you can achieve a finely tuned system. And, the SJ700
auto-tuning algorithm to set certain motor parameters.
The front panel keypad is the first and best way to get to know the inverter's capabilities. Every
function or programmable parameter is accessible from the keypad. All keypads have the same
basic layout, but with different features. The OPE–SRE has a potentiometer knob for frequency
setting input. The SRW–0EX Read/write Copy Unit has the ability to upload (copy) or
download (write) all inverter parameter data to/from memory in the copy unit itself. This unit is
useful in transferring one inverter's settings to another.
The following table shows various programming options, the features unique to each device,
and the cables required.
Part
Device
Number
Inverter keypad, OPE–SRE
U.S. version
Inverter keypad, OPE–S
European version
Read/write Copy SRW–0EX
Unit with Keypad
TIP: Other special-purpose keypads are available, such as ones to serve the needs of the HVAC
market (heating, ventilating & air conditioning). Please contact your Hitachi distributor for
details.
2
Parameter
Parameter
setting
Access
storage
Monitor and EEPROM in
program inverter
Monitor and EEPROM in
program inverter
Monitor and EEPROM in
program; read or inverter or in
write all data copy unit
Series inverters have a built-in
Cables (for optional
external mounting)
Part
Length
number
ICS–1 1 meter
ICS–3 3 meters
Use same two cables as
above
Use same two cables as
above