Appendices; Appendix 1 External Input/Output Forced On/Off - Mitsubishi Electric MELSEC L Series User Manual

APPENDICES

Appendix 1
This function forcibly turns on or off the external input/output of the head module.
(1) Input/output operation when a forced on/off operation is performed
Three types of forced on/off operations are available as shown in the following table. The following table shows
the status of input (X) and output (Y) when a forced on/off operation is performed.
Forced on registration
Forced off registration
Forced on/off clear
CPU module
Program
OFF
OFF
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External Input/Output Forced On/Off
Operation
The remote input (RX) assigned to the input (X) is
transmitted cyclically in a forced on-status.
The remote input (RX) assigned to the input (X) is
transmitted cyclically in a forced off-status.
The remote input (RX) is changed by an external
input.
The following shows the input/output operation when a forced on/off operation is performed.
Master/local
module
X RX
OFF OFF
Y RY
OFF OFF
Forcibly changes the output
(Y) from the master station.
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Input (X) operation
Forcibly changes the input (X)
from the input module.
Head module
RX
Forced
OFF
registration
OFF
RY
Forced
ON
registration
OFF
Output (Y) operation
Regardless of the remote output (RY) that was
transmitted cyclically, "on" is output externally.
Regardless of the remote output (RY) that was
transmitted cyclically, "off" is output externally.
The remote output (RY) of the master station is output
to the external device.
Output Input
module module
ON
ON
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