10
DEVICE EXPLANATION
10.2 Internal User Devices
10.2.1 Input (X)
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10.2.1 Input (X)
(1) Definition
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.
(2) Concept of input (X)
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.
(3) Number of used N/O and N/C contacts
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.
Figure 10.2 Commands from external devices to CPU module
Figure 10.3 Inputs(X)
Figure 10.4 Input(X) Used in Program
1
2
3
Push-button switch
Selector switch
Digital switch
Input (X)
Sequence
operation
LS2
PB1
PB16
XF
X1
X0
Virtual relay
Program
Input ladder (external device)
XF
X0
X1
Programmable
controller
X0
Y21
X0
X0
Y20
Y21
Y23
X1
X2
X2
No restrictions on the
quantity used.
