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10 DEVICES
10.2.1 Inputs (X)
10 - 5
(1) Definition
(a)
Inputs transmit commands or data to the High Performance model QCPU
from an external device such as push-button switches, selector switches,
limit switches, digital switches.
(b)
If the input point is the Xn virtual relay inside the High Performance model
QCPU, the program uses the Xn's N/O contact or N/C contact.
Virtual relay
PB1
LS2
PB16
Input ladder (external device)
(c)
There are no restrictions on the number of Xn N/O contacts and N/C
contacts used in a program, provided the program capacity is not
exceeded.
No restrictions on
the quantity used.
Push-button switch
Selector switch
Digital switch
1
2
3
X0
X0
X1
X1
XF
XF
Figure 10.1 Inputs(X)
X0
X2
X0
X1
X2
Y21
X0
Figure 10.2 Input(X) Used in Program
Input (X)
Sequence
operation
Program
MELSEC-Q
Programmable
controller
Y20
Y21
Y23
10 - 5
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