User`s manual

7 - 8
MELSEC-Q
7. SYSTEM CHECKING FROM PERIPHERAL DEVICE
HELPFUL OPERATION (1)
Perform the following operation if the I/O logic states of the drive unit ready,
upper/lower limit switch and stop signal are different from the initial settings
(negative logic).
1. In the extended parameters, set the logic signals in which the following states
are established during normal operation. (Refer to Section 8.1.)
Drive unit ready, upper limit, lower limit: ON
Stop signal: OFF
2. Write the parameters to the QD75. (Refer to Section 9.1.)
3. Perform steps 1 to 5 in the basic operation of this section.
4. Click the "No" button in the QD75 initialization confirmation dialog box.
5. The operation steps to be performed hereafter are the same as steps 7 to 14 in
the basic operation of this section.
HELPFUL OPERATION (2)
Perform the following operation to restart the axis which was brought to an alarm
stop as the upper/lower limit switch had turned OFF during JOG operation.
1. Click [Online]
[Test] [Error Reset] [Error Reset #1 to #4] menu (
to
).
2. Perform JOG operation to move the axis to within the upper or lower limit range.
HELPFUL CORRECTIVE ACTIONS
Take the following basic corrective actions when Checking connect cannot be
completed properly.
Status Corrective Action
Check the connection of cables with the QD75.
Checking connect cannot
start
In Connection setup, check whether the interface, CPU type and other settings are correct.
(Refer to Section 7.1.)
Check that the servo amplifier is powered on.
Check the connection of the external I/O signal connector.
Drive unit ready signal is
OFF
Change the extended parameter I/O logic.
Check the connection of the external I/O signal connector.
Check for contact of the upper/lower limit switch.
Upper/lower limit signal is
OFF
Change the extended parameter I/O logic.
Check the connection of the external I/O signal connector.
Check the status of the stop switch.Stop signal is ON
Change the extended parameter I/O logic.
JOG operation cannot be
performed.
Check that JOG speed setting is not "0".
Error/warning occurred Check the error/warning code using the help function, and remove the cause.