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MITSUBISHI CNC
III Functional Specifications
15.3.5 Interlock
M720VW
M system
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L system
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The machine movement will decelerate and stop as soon as the interlock signal, serving as the external
input, is turned ON.
When the interlock signal is turned OFF, the machine starts moving again.
(1) In the manual mode, only that axis for which the interlock signal is input will stop.
(2) In the automatic mode, all axes will stop when the interlock signal is input to even one axis which
coincides with the moving axis.
(3) Block start interlock
While the block start interlock signal (*BSL) is OFF (valid), the execution of the next block during
automatic operation will not be started. The block whose execution has already commenced is executed
until its end. Automatic operation is not suspended. The commands in the next block are placed on
standby, and their execution is started as soon as the signal is turned ON.
(Note 1) This signal is valid for all blocks including internal operation blocks such as fixed cycles.
(Note 2) This signal (*BSL) is set ON (invalid) when the power is turned ON. If it is not used, there is no need
to make a program with the PLC.
(4) Cutting start interlock
While the cutting start interlock signal (*CSL) is OFF (valid), the execution of all movement command
blocks except positioning during automatic operation will not be started. The block whose execution has
already commenced is executed until its end. Automatic operation is not suspended. The commands in
the next block are placed on standby, and their execution is started as soon as the signal is turned ON.
(Note 1) The signal is valid for all blocks including internal operation block such as fixed cycles.
(Note 2) This signal (*CSL) is set ON (invalid) when the power is turned ON. If it is not used, there is no
need to make a program with the PLC.
15.3.6 External Deceleration
M720VW
M system
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L system
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This function reduces the feed rate to the deceleration speed set by the parameter when the external
deceleration input signal, which is the external input from the user PLC, has been set to ON. External
deceleration input signals are provided for each axis and for each movement direction ("+" and "-"), and a
signal is valid when the signal in the direction coinciding with the direction of the current movement has been
input. When an axis is to be returned in the opposite direction, its speed is returned immediately to the
regular speed assigned by the command.
When non-interpolation positioning is performed during manual operation or automatic operation, only the
axis for which the signal that coincides with the direction of the current movement has been input will
decelerate.
However, with interpolation during automatic operation, the feed rate of the axis will be reduced to the
deceleration rate if there is even one axis for which the signal that coincides with the direction of current
movement has been input.
The external deceleration input signal can be canceled using a parameter for the cutting feed only.
III - 342
M730VW
M750VW
M720VS
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M730VW
M750VW
M720VS
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M730VS
M750VS
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M730VS
M750VS
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