Mitsubishi QD75P1N User Manual page 649

15 TROUBLESHOOTING
Related buffer memory
address
Axis 1 Axis 2 Axis 3 Axis 4
— — — —
— — — —
— — — —
— — — —
— — — —
— — — —
— — — —
— — — —
Set range
(Setting with sequence program)
—
—
—
—
—
—
—
—
15 - 11
Remedy
—
Check that there is no influence from noise.
Review the sequence program which turns ON/OFF
PLC READY signal (Y0).
Check the power, wiring, and connector connection
status of the drive unit.
• Check the power, wiring, and connector connection
status of the drive unit.
• Check the values in Pr.22
selection.
• When a drive unit without READY signal output is
used, wire the system so that the drive unit READY
signal input of the QD75 is always ON.
Check that there is no error on the personal computer
side I/F to which a cable is connected.
After making an axis error reset (refer to [3] in Section
15.2), perform manual control operation (refer to
CHAPTER 11) to move the axis to the other position in
order that the upper limit signal (FLS) will not turn OFF.
• Check the wiring of the upper limit signal (FLS).
• Check if the values in Pr.22
selection meet the specifications of the limit switch.
• In a system which does not require a hardware stroke
limit (limit switch), wire the system so that the upper
limit signal (FLS) input of the QD75 is always ON.
MELSEC-Q
Input signal logic
Input signal logic