3–2

Choosing a Programming Device

Choosing a Programming Device

Introduction

Configuring

Drive Parameters

 

 

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 SJ200 Series inverters feature intelligent sensorless vector control (iSLV) to eliminate the need for manually setting motor parameters, or even to do an auto-tuning procedure.

Introduction to Inverter Programming

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. The other devices simply imitate the keypad’s layout and inverter access, while adding another valuable aspect to the system. For example, the Digital Operator/Copy Unit can transfer one inverter’s parameter settings to another inverter, while still providing standard operator keypad control. In this way, you can use a variety of programming devices with basically the same keypad skills. The following table shows various programming options, the features unique to each device, and the cables required.

 

Part

Parameter

Parameter

Cables (choose one)

Device

setting

 

 

Number

Access

Part number

Length

 

storage

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Inverter keypad,

OPE–SRmini

Monitor and

EEPROM in

ICS–1

1 meter

removable

 

program

inverter

 

 

 

ICS–3

3 meters

 

 

 

 

 

 

 

 

 

 

Digital Operator/

SRW–0EX

Monitor and

EEPROM in

ICS–1

1 meter

Copy Unit

 

program

operator panel

 

 

 

ICS–3

3 meters

 

 

 

 

 

 

 

 

 

 

NOTE: When an external digital operator device such as an OPE–SRmini or SRW–0EX is connected to the inverter, the inverter’s keypad is automatically disabled (except for the Stop Key).