Jogging Command - Hitachi SJ300 Series Instruction Manual

4–16
Using Intelligent Input Terminals
Jogging
Command
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. There-
fore setting the jogging frequency A038 too
high will cause inverter tripping.
A jog command may arrive while the motor
is running. You can program the inverter to
either ignore or respond to a jog command
in this case by using function A039. The
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
Disabled, A039=
00
01
02
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]
[FW]
A038
Output
frequency
A039=00, 01, 02
Decelerating stop (00) shown
Opt.
Symbol Function Name
Code
06 JG Jogging
C001, C002, C003, C004,
Valid for
C005, C006, C007, C008
inputs:
A002= 01, A038 > B082,
Required
A038 > 0, A039=00 to 05
settings:
Notes:
• Jogging is not performed when the value of
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.
[JG]
[FW]
[RV]
A038
Output
frequency
Jog Deceleration Method
Enabled, A039=
03 Free-run stop (coasting)
04 Deceleration (normal level) and stop
05 Use DC braking and stop
[JG]
[FW]
A038
Output
frequency
t
Input
State
ON Enters Jog Mode if enabled (see above)
OFF Jog is OFF
Example: (Default input configuration
shown—see page 3–47. Jumper position
shown is for –xFU/-xFR models; for –xFE
models, see page 4–12.)
P24
Jog decel type
A039
A039=03, 04, 05
Free-run stop (05) shown
Description
JG
TH FW CM1
8 5 3 1
PLC CM1
7 6 4 2
See I/O specs on page 4–9.
t
t