Omron CS1W-MCH71 -, Руководство по эксплуатации

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11
Control System Configuration and Principles
Section 1-4
Override (Real-time Speed
Change) Changes the speed during PTP, linear interpolation, or circular interpolation
operations.
Backlash Correction Compensates errors caused by faulty meshing in the mechanical system.
Unlimited Feeding Controls axes such as turntables and conveyors that are fed only in one direc-
tion unlimitedly.
Debugging It is possible to execute just one line of a program through single block opera-
tion. It is also possible to run programs without operating the machine system
through Machine Lock.
Data Storage Backups and restores data using PLC memory cards.
Arithmetical Operation
Command Performs Simple arithmetic operation, Functions, and Logic Operations.
Zones (Supported For unit
version 3.0 and later.) • A zone bit turns ON when any variable (including feedback present posi-
tion, feedback speed, etc.) is within the set range, and OFF when outside
of the set range.
• A maximum of 32 zones can be set.
1-4 Control System Configuration and Principles
The servo system used by and the internal operations of the MC Unit are
briefly described below.
1-4-1 Control System Configuration
Semi-closed Loop System The MC unit uses the servo system called the semi-closed loop system.
This system is designed to detect actual machine travel distance for a com-
mand value using rotations of the motor and the detected value is fed back to
the MC unit. The unit computes and compensates the error between the com-
mand value and actual travel distance to make it zero.
The semi-closed loop system is the mainstream in modern servo systems
applied to positioning devices for industrial applications.
Motion controller
Command
Actual travel
distance
Encoder
Servomotor
Decelerator
Table
Ball screw