Performing Positioning Operation (Simple Position Control Function); Overview Of Simple Position Control Function And Basic Settings - Hitachi WJ Series User Manual

Chapter 9
9.14 Performing Positioning Operation
(Simple Position Control Function)
9.14.1

Overview of Simple Position Control Function and Basic Settings

 How to perform the position control based on the origin like a servo?
Q
 How to perform the positioning operation by moving to a position at a fixed distance with
conveyors or carrier machines?
 The WJ-C1 is equipped with a simple position control function. It enables the simple positioning
A
operation by feeding pulse signals from an external encoder, etc. back to the inverter. The main
functions of the simple position control are as follows.
- Multistage position control function (up to 8 target positions can be set, and the target
position is selected by I/O input)
- Turntable function (without rotation limit)
- Positioning restart function
- Homing (Homing function, Current position clear function, Current position preset
- Speed/position control switching function
- Brake control interlock function
 For details on the positioning operation, refer to "Operation procedure for simple position
control function" described in this section.
 The inverter starts with the current position cleared to zero when the power is turned on. In
addition, if the motor rotates while the power is interrupted, the position cannot be counted at
that time, which may cause position misalignment. Therefore, consider homing when power is
turned on, or using the current position at power off save function. For details, refer to "9.14.2
Performing Homing Function during Positioning Operation".
 The simple position control function is available when using the first control mode. This function
!
does not work when "2nd-motor control [SET]" is turned on. The "Permission of torque control
[ATR]" function is also disabled.
Code
Detect speed
[d008]
monitor
Position reference
[d029]
monitor
Current position
[d030]
monitor
[A051] DC braking selection
[A054] DC braking force
Reset mode
[C102]
selection
Multistage input
[C169]
determination time
Pulse input, target
[P003]
function selection
Simple positioning
[P012]
selection
function, Current position at power off save function)
Item
Monitors the feedback detection speed.
Monitors the current commanded position.
Monitors the current position.
Set to "Disable (00)". In the simple position
control function, the DC braking is
automatically applied when the positioning
is completed even if "Disable (00)" is
selected.
Set the DC braking force at the completion
of positioning.
Set to "Only enable in trip status
(Trip release at turn-ON, clear only trip
memory)".
Time required to determine a position set-
point when a multistage position set-point
switching is performed.
Set to "Speed feedback (01)".
Set to "Simple positioning enabled (02)".
Description
9-14-1
Inverter Functions
Data
-590.00 to +590.00 (Hz)
-268435455 to
+268435455 (pls)
00
0 to 100 (%) (ND mode)
0 to 70 (%) (LD mode)
03
0 to 200 (× 10 ms)
01
02