Mitsubishi Electric MELDAS C6 Interface Manual page 203

B con-
Signal name
tact
—
DOOR OPEN II
[Function]
This signal stops all axes, and cuts off contactor power.
[Operation]
The NC carries out the following operations when the "Door open II" signal turns ON.
(1) A deceleration stop is carried out for all axes (servo axes and spindles). (Axis interlock)
(2) After all axes stop, the contactor power of each drive unit is cut off. The servo READY signal
does not turn OFF.
(3) The "Door open enable" signal turns ON.
(4) Automatic operation start is valid during door interlock. Note that an interlock is applied on the
axis movement.
(5) If the door interlock (door open signal) turns ON during axis movement, the axis will decelerate
to a stop. The axis movement will resume when the door interlock (door open signal) turns OFF.
The NC carries out the following operations when the "Door open II" signal turns OFF.
(1) A ready ON and servo ON state occurs for all axes.
(2) The "Door open enable" signal turns OFF.
[Caution]
(1) Handling of the PLC axis
Set so a "Door open" signal is output to the NC after the PLC axis is stopped by the PLC.
If a "Door open" signal is input without stopping the PLC axis, the axis will stop with a dynamic
brake method due to the ready OFF state.
The remaining distance will be held in the R register being used in the DDB.
(2) Handling of the analog spindle
When an analog spindle is connected, it is not possible to confirm that the spindle has
completely stopped with the NC. Thus, confirm that the spindle has completely stopped using
the PLC, before opening the door.
Because the spindle may start rotating again immediately after the door is closed, for safety turn
the forward run and reverse run signals OFF when the door is open.
(3) Opening the door during ATC operation
When opening the door during ATC operation, apply an interlock with the user PLC.
[Related signals]
Door open enable signal (X429)
6. EXPLANATION OF INTERFACE SIGNALS
6.3 PLC Output Signals (Bit Type: Y***)
Signal
abbreviation
DOOR2
6-3-6
1st system 2nd system
Y429 —
3rd system
—