Mitsubishi Electric MELSEC-FX3S Series - Switching of Input Mode

C-20
4 Programming
FX 3S /FX 3G /FX 3GC /FX 3U /FX 3UC PLC User's Manual - Analog Control Edition
FX3U-4AD-ADP (4-channel Analog Input)
4.3 Switching of Input Mode
4.3 Switching of Input Mode
Turn the special auxiliary relay on/off to switch the input mode of 4AD-ADP between the current input mode
and the voltage input mode.
To switch the input mode, use the following special auxiliary relays:
•FX
3S Series PLC
•FX
3G/FX3GC Series PLC
•FX
3U/FX3UC Series PLC
1. Program Example (For FX3U/FX3UC Series PLC)
To switch the channel input mode, create a sequence program as follows:
Special auxiliary relay Description
M8280 Switches the input mode of channel 1
OFF: Voltage input
ON: Current input
M8281 Switches the input mode of channel 2
M8282 Switches the input mode of channel 3
M8283 Switches the input mode of channel 4
Special auxiliary relay
Description
1st 2nd
M8280 M8290 Switches the input mode of channel 1
OFF: Voltage input
ON: Current input
M8281 M8291 Switches the input mode of channel 2
M8282 M8292 Switches the input mode of channel 3
M8283 M8293 Switches the input mode of channel 4
Special auxiliary relay
Description
1st 2nd 3rd 4th
M8260 M8270 M8280 M8290 Switches the input mode of channel 1
OFF: Voltage input
ON: Current input
M8261 M8271 M8281 M8291 Switches the input mode of channel 2
M8262 M8272 M8282 M8292 Switches the input mode of channel 3
M8263 M8273 M8283 M8293 Switches the input mode of channel 4
1) To switch the input mode of channel 1
of the 1st analog special adapter to
the voltage input mode:
M8001
M8260
Normally OFF
2) To switch the input mode of channel 2
of the 1st analog special adapter to
the current input mode:
M8000
M8261
Normally ON