Mitsubishi Electric MELDAS C6 Interface Manual page 93

B con-
Signal name
tact
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DOOR OPEN ENABLE
[Function]
This signal notifies the PLC that the drive power to all axes is turned OFF due to "Door open" signal,
or that the same status is canceled.
[Operation]
This signal turns ON when the drive power to all axes is turned OFF due to "Door open" signal
turning ON.
This signal turns OFF at all axes ready ON and at all servo axes servo ON, due to "Door open"
signal turning OFF.
Release of the door lock is enabled at the rising edge of "Door open enable" signal.
The operation is in a READY status at the falling edge of "Door open enable" signal.
[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 (DOOR1, DOOR2: Y428, 429)
6. EXPLANATION OF INTERFACE SIGNALS
6.1 PLC Input Signals (Bit Type: X***)
Signal
abbreviation
DROPNS
6-1-4
1st system 2nd system
X429 —
3rd system
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