Mitsubishi Electric QD75MH1 User Manual page 696

15 TROUBLESHOOTING
Related buffer memory
address
Axis 1 Axis 2 Axis 3 Axis 4
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Set range
(Setting with PLC program)
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15 - 7
Remedy
• Check that there is no influence from noise.
• Check hardware for possibility of fault.
• Review the PLC program which turns ON/OFF PLC
READY signal (Y0).
• Cancel the error with an axis error reset.
(Refer to Section 15.1[3])
Check the servo amplifier power, wiring with the servo
amplifier, and connection of connectors, and cancel the
error with an axis error reset. (Refer to Section 15.1[3])
• Check that there is no error on the personal computer
side I/F to which a cable is connected.
• Change the transmission speed (serial communication
baud rate selection) between the personal computer
and the QD75MH. (Refer to Section 5.2.9
After making an axis error reset (refer to [3] in Section
15.1), 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 turn ON.
After making an axis error reset (refer to [3] in Section
15.1), perform manual control operation (refer to
Chapter 11) to move the axis to the other position in
order that the lower limit signal (RLS) will turn ON.
Check whether the stop commands (output
signals/external inputs to QD75MH) are turned ON or
OFF. Turn OFF the ON commands.
• Output signals to QD75MH
Axis 1: Y4, Axis 2: Y5, Axis 3: Y6, Axis 4: Y7
• External input
Connectors for external device connection:
Stop signals (STOP)
After confirming the stop command status, cancel the
error with an axis error reset. Then turn ON a start
signal. (Refer to Section 15.1[3])
The PLC READY signal (Y0) is turned from OFF to ON
when all BUSY signal is turned OFF.
Do not request the start when the axis operation state is
other than "standby", "stop", and "step standby".
MELSEC-Q
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Pr.133
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