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5.2.1
Input (X)
Inputs are the device used to obtain the on and off information from external devices to a CPU module.
(1) Concept of input
One input point is assumed to be a virtual relay Xn in the CPU module. Programs use the normally open or
closed contact of Xn.
PB1
PB2
PB16
Input circuit (external device)
The input (X) can also be used for refresh target device (CPU module side) of remote input (RX) in CC-Link IE
Field Network, CC-Link IE Field Network Basic, or CC-Link.
5.2.2
Output (Y)
The output (Y) is used to output control results in programs to external devices.
Push-button switch
Selector switch
Digital switch
1
2
3
Virtual relay
X0
X1
XF
CPU module
Output (Y)
CPU module
Input (X)
Program
Signal lamp
Digital display
Contactor
CHAPTER 5 DEVICES
Programmable
controller
293
5
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