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4 Programming
4.6 Setting whether or not a channel is used
FX
3G
/FX
3U
/FX
3UC
PLC User's Manual - Analog Control Edition
FX
3U
-3A-ADP (2-channel analog Input, 1-channel analog output)
4.6 Setting whether or not a channel is used
The 3A-ADP sets to ON or OFF special auxiliary relays to set whether or not each channel is used.
This setting can be used to disable or enable the input or output channels of the 3A-ADP.
•FX
3U, FX3UC Series PLCs
•FX
3G Series PLC
POINT
When the setting whether or not the output channel is used is changed from "Used (OFF)" to "Not used (ON)",
the last output before the change is held.
1. Program Example (For FX3U, FX3UC Series PLCs)
Set whether or not each channel is used in a sequence program.
Special auxiliary relay
Description
1st 2nd 3rd 4th
M8267 M8277 M8287 M8297
Sets whether or not input channel
1 is used.
OFF: Channel is used.
ON: Channel is not used.
M8268 M8278 M8288 M8298
Sets whether or not input channel
2 is used.
M8269 M8279 M8289 M8299
Sets whether or not output channel
is used.
Special auxiliary relay
Description
1st 2nd
M8287 M8297
Sets whether or not input channel
1 is used.
OFF: Channel is used.
ON: Channel is not used.
M8288 M8298
Sets whether or not input channel
2 is used.
M8289 M8299
Sets whether or not output channel
is used.
1) To set that input channel 2 in the 1st unit
is not used:
M8001
M8268
Normally OFF