Hitachi SJ300 Series Jogging, Command

[JG]

[FW]

[RV]

A038

4–16

Using Intelligent Input Terminals

Jogging

Command

Operations and Monitoring

The Jog input [JG] is used to command the motor to rotate slowly in small increments for manual operation. The speed is limited to 10 Hz. The frequency for the jogging operation is set by parameter A038. Jogging does not use an acceleration ramp. Therefore setting the jogging frequency A038 too high will cause inverter tripping.

A jog command may arrive while the motor	Output			t
is running. You can program the inverter to	frequency
either ignore or respond to a jog command		Jog decel type
in this case by using function A039. The			A039
type of deceleration used to end a motor jog

is also selectable by programming function A039. Six jog mode options are defined below:

Jogging During Motor Operation
		Jog Deceleration Method
Disabled, A039=	Enabled, A039=
00	03	Free-run stop (coasting)
01	04	Deceleration (normal level) and stop
02	05	Use DC braking and stop

In the left example diagram below, the Jog command is ignored. In the right example diagram, a jog command interrupts a Run mode operation. However, if the Jog command turns ON before the [FW] or [RV] terminal turns ON, the inverter output turns OFF.

[JG]

[JG]

[FW]

[FW]

A038

A038

Output

Output

frequency

frequency

t

t

A039=00, 01, 02

A039=03, 04, 05

Decelerating stop (00) shown

Free-run stop (05) shown

Opt.

Symbol

Function Name

Input

Description

Code

State

06

JG

Jogging

ON

Enters Jog Mode if enabled (see above)

OFF

Jog is OFF

Valid for

C001, C002, C003, C004,

Example: (Default input configuration

inputs:

C005, C006, C007, C008

shown—see page 3–47. Jumper position

shown is for –xFU/-xFR models; for –xFE

Required

A002= 01, A038 > B082,

models, see page 4–12.)

settings:

A038 > 0, A039=00 to 05

JG

Notes:

TH

FW

8

CM1

5

3

1

• Jogging is not performed when the value of

P24

PLC

CM1

7

6

4

2

A038 jogging frequency is smaller than the

start frequency B082 or the value is 0 Hz.

• Be sure to turn ON [FW] or [RV] after the [JG] input turns ON for a jog operation.

•When setting A039 to 02 or 05, you must also

set the DC braking parameters. See I/O specs on page 4–9.