Hitachi WJ C1 Series User Manual

Chapter 9 Inverter Functions
9-5-14
9.5.8 Using Encoder Feedback
 What settings and wiring are used for encoder feedback?
 Pulse input or encoder feedback input to the [PLA]/[PLB] terminals enable pulse frequency
command, the V/f control with encoder function, and the simple position control function. To
enable each function, set each parameter in the combinations shown in the table below.
 "Pulse input A [PLA]" is fixed to input terminal [8], and "Pulse input B [PLB]" can only be assigned
to input terminal [7].
 Set the number of encoder pulses in units of (pulses/rotation), as converted to their motor shaft
equivalents.
 Set the "Pulse input, target function selection [P003]" to "Speed feedback (01)" to operate the
"Detect speed monitor [d008]". Make sure to set the correct number of motor poles and
encoder pulses when using [d008].
 Regardless of the "Pulse input mode selection [P004]" setting, pulse inputs are counted in
increments of +1 or -1 at the falling edge of the [PLA] terminal. (Even in the case of AB-phase
90° shift pulse input, counting is performed in multiples of 1.)
Code
Item
Description
Data
[d008]
Detect speed monitor
Monitors the feedback detection speed. This function
is enabled when "Pulse input, target function
selection [P003]" is set to "Speed feedback (01)".
-590.00 to
+590.00 (Hz)
[H004]
Async. Motor number of
poles
Sets the number of motor poles.
2 to 48 (poles)
[P003]
Pulse input, target
function selection
Speed feedback
01
[P004]
Pulse input mode
selection
Single-phase pulse input
00
90 degrees shift pulse
01
Forward and reverse command and pulse
03
[P011]
Encoder constant
Sets the number of connected encoder pulses
according to the number of pulses per motor
revolution (multiplier of 1).
32 to 1024 (pls)
[P012]
Simple positioning
selection
Simple position control disabled
00
Simple position control enabled
02
[P901]
Speed detection filter
constant for encoder
pulse
Filter time constant for the detected speed by
encoder pulse input.
0 to 9999 (ms)
[C007]
Input terminal [7]
function
Pulse input B [PLB]:
Assigns B-phase pulse input or direction signal
input for encoder feedback. [PLB] can only be
assigned to input terminal [7].
85
■ Combinations of related functions and settings using pulse input
Enabled function
Setting
Reference section
Pulse frequency
command
[P003] = Pulse input frequency command (00)
[P004] = Single-phase pulse input (00)
[P012] = Simple positioning disabled (00)
"9.2.8 Setting Frequency
Command by Pulse Input"
V/f control with
encoder
[A044] = V/f control (00 to 02)
[P003] = Speed feedback (01)
[P012] = Simple positioning disabled (00)
"9.5.5 Driving with V/f
Control with Encoder"
Simple position
control
[P003] = Speed feedback (01)
[P012] = Simple positioning enabled (02)
"9.14 Performing Positioning
Operation (Simple Position
Control Function)"
Q
A
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Hitachi WJ C1 Series Specifications

General

Brand	Hitachi
Model	WJ C1 Series
Category	Inverter
Language	English