Hitachi WJ Series

Chapter 9 Inverter Functions
9-2-10
9.2.5 Setting Frequency Command for Jogging and Inching Operation
 How to drive the motor in short discrete steps?
 How to perform inching?
 Jogging operation allows positioning and fine adjustments while the motor is stopped.
 After the "Jogging [JG]" input terminal is turned on, jogging operation can be started by giving
the RUN command.
 During jogging operation, a frequency command is set according to the "Jogging frequency
[A038]" setting without including an acceleration time. This can easily lead to issue such as an
overcurrent trip. Be sure to appropriately adjust the [A038] to avoid a trip.
 Jogging operation is given priority over "Frequency input source selection [A001]
*1
", "Multi-speed
[CF1] to [CF4]/[SF1] to [SF7] (02 to 05/32 to 38)", "Force terminal [F-TM] (51)", and "Force
operation [F-OP] (31)".
Code
Item
Description
Data
[A038]
Jogging
frequency
Sets the frequency command value during jogging.
Minimum
frequency to
10.00 (Hz)
[A039]
Jogging stop
mode selection
Disable during operation, free run when stopped
*2
00
Disable during operation, deceleration stop when stopped
01
Disable during operation, DC braking when stopped
*3
02
Enable during operation, free run when stopped
*2
03
Enable during operation, deceleration stop when stopped
04
Enable during operation, DC braking when stopped
*3
05
[C001]
to
[C007]
Input terminal
function
Jogging [JG]:
After this terminal is turned on, jogging operation
starts once the RUN command is on.
06
*1. "2nd-motor control [SET]" target parameter. The second control parameter is also subject to setting.
*2. If "Jogging stop mode selection [A039]" is set to "Free run at jogging stop (00, 03)", the free run operation
settings are required. For details, refer to "9.7.6 Starting after Free Run Stop".
*3. If "Jogging stop mode selection [A039]" is set to "DC braking at jogging stop (02, 05)", the DC braking
settings are required. For details, refer to "9.7.8 Stopping with DC Braking".
■ Disabling jogging during operation ([A039] = "Disable at run (00, 01, 02)")
 When "Jogging stop mode selection [A039]" is set to "Disable at run (00, 01, 02)", jogging cannot
be performed if the RUN command has been turned on first.
■ Enabling jogging during operation ([A039] = "Enable at run (03, 04, 05)")
 When "Jogging stop mode selection [A039]" is set to "Enable at run (03, 04, 05)", jogging can be
performed even if the RUN command has been turned on first. However, if the [JG] terminal is
turned off first, a free-run stop is performed.
[JG]
[FW]
[RV]
Output
Frequency
[A038]
Output
frequency
[FW]
[JG]
If jogging operation has started
If jogging operation has not started
[A038]
Accelerates according to the
"Restart mode after FRS release
[b088]" setting.
Fre run
Normal
operation
Deceleration
Jogging
operation
Output
frequency
[FW]
[JG]
Q
A
!