
12
2–1 Switch
Settings
Always turn off PC power before setting the unit number switch. Use a regu-
lar screwdriver, being careful not to damage the slot in the screw. Be sure not
to leave the switch midway between settings.
Switch
Function
Unit number
(Machine no.)
Used to set the unit number (between 0 and 9).
Do not set the same number for more than one Special I/O Unit.
Doing so will cause an error and prevent operation.
Mode
Used to set the mode from 0 to 3.
This switch sets one of operation modes 0 to 3. Select an appropriate opera-
tion mode in accordance with the motor driver or signal lines to be used.
Set the Position Control Unit in this mode when it controls a stepping motor
driver. In this mode, connect a sensor to the origin signal lines (connector pin
nos. A11 and B11). The response time of the origin signal is 1 ms.
NC112
Origin
A11
B11
A10
B10
Pulse
24 VDC
Pulse motor
driver
M
Origin
proximity
This mode is used to control a servomotor driver. In this mode, the origin line
driver input signal lines and deviation counter reset output signal lines are
connected, but the driver completed signal lines are not used. The response
time of the origin line driver input signal is 0.1 ms.
NC112
Origin
proximity
A10
B10
Origin
line driver
A8
B8
Deviation
counter
reset
A6
B6
Pulse
24 VDC
5 VDC
+
–
Servomotor driver
Z-phase output
Deviation counter
reset input
E
M
Use this mode when controlling a servomotor driver, and when the driver
completed signal is necessary.
Mode Switch
Mode 0
Mode 1
Mode 2
Switch Settings