Hitachi SJ300 Series Keypads, Inverter, Programming, Introduction, Part, Part, Device, Number, Access, Length, number, setting, storage, Parameter, Parameter, external mounting)

3–2

Choosing a Programming Device

Configuring Drive	Parameters

Introduction

Inverter

ProgrammingKeypads

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 difficult 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 parameters 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 parameters 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 SJ300 Series inverters have a built-in 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.

			Parameter	Cables (for optional
	Part	Parameter	Parameter	external mounting)
Device	Part	Parameter	setting
Device	Number	Access	setting	Part
	Number	Access	storage		Length
			storage
				number
				number


Inverter keypad,	OPE–SRE	Monitor and	EEPROM in	ICS–1	1 meter
U.S. version		program	inverter
U.S. version		program	inverter	ICS–3	3 meters
				ICS–3	3 meters

Inverter keypad,	OPE–S	Monitor and	EEPROM in	Use same two cables as
European version		program	inverter	above

Read/write Copy	SRW–0EX	Monitor and	EEPROM in	Use same two cables as
Unit with Keypad		program; read or	inverter or in	above
		write all data	copy unit

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.