Omron CJ1M-CPU21, Operation Manual

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Origin Search and Origin Return Functions Section 6-3
6-3-4 Origin Search Examples
Operation
Connect a Servo Driver and execute an origin search based on the Servomo-
tor's built-in encoder phase-Z signal and a Origin Proximity Input Signal.
Conditions
• Operating mode: 1
(Uses the Servomotor encoder's phase-Z signal as the Origin Input Sig-
nal.)
• Origin search operation setting: 0
(Sets reverse mode 1. Reverses direction when the limit input signal is
input in the origin search direction.)
• Origin detection method: 0
(Reads the Origin Input Signal after the Origin Input Signal goes
OFF
→
ON
→
OFF.)
• Origin search direction: 0 (CW direction)
System Configuration
Instructions Used
ORG(889)
I/O Allocations
Inputs
CW limit
detection
sensor
Origin Proximity
Input sensor
Workpiece
CCW limit
detection
sensor
Servomotor
Encoder
CJ1M CPU Unit Basic I/O Units
Allocations in CIO 0000
•
Bit 00: CW limit detection sensor
•
Bit 01: CCW limit detection sensor
Servomotor Driver
To built-in input IN1
Pulse output from built-in
outputs OUT0 and OUT1
To Input
Unit
To built-in
input IN0
Servomotor
encoder's phase-Z
input; Origin input
Built-in I/O terminal Bit address Name
IN0 CIO 296000 Origin Search 0 (Origin Input Signal)
(Servomotor encoder's phase-Z signal)
IN1 CIO 296000 Origin Search 0 (Origin Proximity Input Signal)
--- A54008 Pulse Output 0 CW Limit Input Signal
--- A54009 Pulse Output 0 CCW Limit Input Signal
--- CIO 000000 CW limit detection sensor
--- CIO 000001 CCW limit detection sensor