KEYENCE CV-X Series - Manual (Page 17)

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The wiring connection of the I/O terminal of the CV‐X100 Series can be checked.
2. Checking the connection status of the I/O terminal (I/O Monitor)
Select "Utility" > "I/O Monitor" to open the I/O Monitor.
Check the box to set to ON (short circuit), and uncheck it to set to
OFF (open).
Manual Output can only be used in Setup Mode.
If proper ON/OFF status in conjunction with checking/unchecking the box cannot be confirmed, check the wiring again.
[Output Terminal]
Check the "Manual Output" box to forcefully turn selected output terminals ON. Check the "OUT0 (ACK)", "OUT1 (NACK)" and
"OUT3 (CMD_READY)" boxes, and confirm that the ON/OFF status of the signal can be detected on the target PLC.
[Input terminal]
Turn ON the terminals corresponding to "IN0 to 7 (CMD_PARAM0 to 7)", "IN8 to 11 (CMD_CODE0 to 3)" and "IN12 (CST)" from the
connected PLC. When the boxes for the terminals that were turned ON become checked, it can be confirmed that the wiring is correct.
Click the button at the top right of the screen to switch to Setup Mode.
When the corresponding terminal is turned ON from the PLC, the
box becomes checked.