Hitachi X200 Series instruction manual Operational Modes, Run Mode Edit, Control Algorithms

3−5

Operational Modes

The RUN and PRG LEDs tell just part of the story; Run Mode and Program Modes are independent modes, not opposite modes. In the state diagram to the right, Run alternates with Stop, and Program Mode alternates with Monitor Mode. This is a very important ability, for it shows that a technician can approach a running machine and change some parameters without shutting down the machine.

Run

Monitor

STOP

RESET

Stop

RUN

FUNC

Program

The occurrence of a fault during operation will cause the inverter to enter Trip Mode as shown. An event such as an output overload will cause the inverter to exit the Run Mode and turn OFF its output to the motor. In the Trip Mode, any request to run the motor is ignored. You must clear the error by pressing the Stop/Reset switch. See “Monitoring Trip Events, History, & Conditions” on page 6-5.

	STOP
Run	RESET	Stop
	RUN
		STOP
		RESET
Fault	Trip	Fault

Configuring Parameters

Run Mode Edit

The inverter can be in Run Mode (inverter output is controlling motor) and still allow you to edit certain parameters. This is useful in applications that must run continuously, you need some inverter parameter adjustment.

The parameter table in this chapter have a column titled “Run
Mode Edit”. An Ex mark	means the parameter cannot be	Run
edited; a Check mark 9 means the parameter can be edited.		Mode
The Software Lock Setting (parameter B031) determines when		Edit
the Run Mode access permission is in effect and access
permission in other conditions, as well. It is the responsibility
		9
of the user to choose a useful and safe software lock setting for
the inverter operating conditions and personnel. Please refer to
“Software Lock Mode” on page 3-36 for more information.

Drive

Control Algorithms

The motor control program in the X200 inverter has two sinusoidal PWM switching algorithms. The intent is that you select the best algorithm for the motor characteristics in your application. Both algorithms generate the frequency output in a unique way. Once configured, the algorithm is the basis for other parameter settings as well (see “Torque Control Algorithms” on page 3-16). Therefore, choose the best algorithm early in your application design process.

Inverter Control Algorithms

Variable freq. control,

constant torque

Output

Variable freq. control,

reduced torque