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3
1–2
Components
In addition to the front-panel components described below, there is a DIP
switch located on the back panel. Pin settings for this switch, which are de-
scribed in
Section 2–1, determine certain aspects of Unit operation.
When setting the switches, use a screwdriver if necessary.
Do not apply excessive force to the switches.
Do not leave the switches halfway between two setting points or the Position
Control unit may malfunction.
Before operating these switches, make sure that power to the PC is off.
Indicators
RUN: indicates operation
is in progress
CW: indicates motor
is revolving clockwise
CCW: indicates motor
is revolving counterclockwise
BUSY: indicates operation/transfer
is in progress
ALARM: flashes when an abnormal-
ity has occurred
ERROR: lights when an error has oc-
curred
Setting switches
MACHINE No.
MODE
Allocates a unit number (0 to 9) to
the Position Control Unit
Selects an operating mode (0 to 3).
Connector
Used to connect the Position
Control Unit to a stepping mo-
tor driver or servomotor driver.
Attach the enclosed connector
to the proper cable.
Position Control Unit indicators (LEDs) are used to quickly determine operat-
ing status. They are particularly valuable in initial system activation and de-
bugging, but can also be used to monitor Unit operation.
Indicator
Color
Function
RUN
Green
Lit during normal operation. Goes out on errors.
CW
Green
Lit during output of CW (clockwise) pulses.
CCW
Green
Lit during output of CCW (counterclockwise)
pulses.
BUSY
Green
Lit during positioning or data transfer.
ALARM
(flashing)
Red
Flashing when a BCD error exists in initial data,
speed data, or positioning data updated with
TRANSFER DATA.
ERROR
Red
Lit when an error has caused operation to stop.
1–3
Basic Operating Principles
The basic operation of the C200H-NC112 Position Control Unit is fairly sim-
ple. It controls either a stepping motor or a servomotor in accordance with
Indicators
Basic Operating Principles