Справочник Пользователя для Mitsubishi Electronics QD75MH2

15 - 7

MELSEC-Q

15 TROUBLESHOOTING

Related buffer memory

address

Axis 1 Axis 2 Axis 3 Axis 4

Set range

(Setting with PLC program)

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

Pr.133

)

— — — —

—

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".