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control comes from the program of the PC or from connections to external
inputs (e.g., control panel switches). (Lists of Position Control Unit inputs and
outputs can be found under
I/O Circuits in Section 2–2.) The following config-
uration diagrams show only the positioning system itself. Refer to the operat-
ing manuals for other OMRON control devices for details on extended control
system operation.
Control signal input switches
C200H PC
Position Control Unit C200H-NC112
Input Unit
Stepping motor (or ser-
vomotor) driver control
signal line
Power supply
Hand-held Programming
Console C200H-PRO27
Stepping motor driver
(or servomotor driver)
Operation panel
Operation switch
Stepping motor
(or servomotor)
1–5
Positioning System Principles
Positioning systems can be quite simple or relatively complex. The most ba-
sic is an open-loop system, in which a particular operation is carried out ac-
cording to programmed instructions, but in which feedback is not provided for
Positioning System Principles