Detailed Explanation Of Devices; Input/Output X, Y - Mitsubishi Electric MELDAS C6 Programming Manual

5.3 Detailed Explanation of Devices

The devices used with the PLC are described below.

5.3.1 Input/output X, Y

Input/output X and Y are a window for executing communication with the PLC and external device or
controller.
Input X
(1) This issued commands or data from an external device such as a push-button, changeover
switch, limit switch or digital switch to the PLC.
(2) Assuming that there is a hypothetical relay Xn built-in the PLC per input point, the program
uses the "A" contact and "B" contact of that Xn.
(3) There is no limit to the No. of "A" contacts and "B" contacts of the input Xn that can be used in
the program.
Hypothetical relay
PB1
LS2
PB16
Input circuit
(4) The input No. is expressed with a hexadecimal.
Output Y
(1) This outputs the results of the program control to the solenoid, magnetic switch, signal lamp or
digital indicator, etc.
(2) The output (Y) can be retrieved with the equivalent of one "A" contact.
(3) There is no limit to the No. of "A" contacts and "B" contacts of the output Yn that can be used in
the program.
Y10
Y10
Y10
Program
(4) The output No. is expressed with a hexadecimal.
5. Explanation of Devices
5.3 Detailed Explanation of Devices
X10
X11
X1F
PLC
Y10
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PLC
X10
X11
X1F
Program
24V
Output circuit
Load