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3.11.3 External input/output forced on/off
The external input/output can forcibly be turned on/off using a programming tool. The information registered for forced
on/off can be cancelled by an operation from a programming tool.Note 3.4
(1) Input/output operation when a forced on/off operation is performed
There are three kinds of forced on/off operations: forced on ("Set forced ON"), forced off ("Set forced OFF"), and
forced on/off cancellation ("Cancel it"). The following table lists the CPU module operation of when a forced on/off
operation is performed.
Note 3.4
Before executing the function with the Q02UCPU, Q03UDCPU, Q04UDHCPU, Q06UDHCPU, Q13UDHCPU, or
Q26UDHCPU, check the versions of the CPU module and programming tool used.
( Page 465, Appendix 2)
Operation Input (X) operation Output (Y) operation
Forced on/off
cancellation (no
operation)
The CPU module performs sequence program
operations using external inputs.
The CPU module outputs the results of sequence
program operations externally.
Forced on
The CPU module performs sequence program
operations using inputs forcibly turned on.
The CPU module outputs "on" externally
regardless of the results of sequence program
operations.
Forced off
The CPU module performs sequence program
operations using inputs forcibly turned off.
The CPU module outputs "off" externally
regardless of the results of sequence program
operations.
MO
XO
Y10
Y10
Y11
M1
END
Y10 device forced off
X0 device forced off
Y10 output
(off)
X0 input
(on)
External input is
forcibly turned off.
On the ladder block, Y10 appears to be on even
though a forced off operation is performed.
Output forced on/off operation
Input forced on/off operation
Output refresh
Input refresh
Program execution
External output
(Y10 off)
External input
(X0 on)
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