Mitsubishi Electric MELDAS 600M Series Instruction Manual page 384

6.22 External deceleration
(1) Outline
When the external deceleration signal, an external input from the user PLC, is input, this function
immediately drops the feedrate to the external deceleration speed set in the parameters.
(2) Explanation of function
(a) The external deceleration input signal is provided for each axis and for each movement
(b) When the axis is returned in the reverse direction, the command speed will be returned to
(c) During manual operation or automatic operation's non-interpolation positioning, only the axis
(d) During automatic operation interpolation, if there is any axis for which the input signal
(e) The external deceleration input signal can be invalidated only for cutting feed by setting the
(f) A warning is output while moving with external deceleration speed.
(3) Combination with other functions
(a) External deceleration is valid even during the feed per rotation (G95) and inverse time feed
(b) External deceleration is valid even during F1-digit feed.
(c) External deceleration is valid even during dry run.
(d) If the external deceleration speed is slower than the overridden speed, the speed will drop to
(e) External deceleration is valid even during automatic corner override (G62).
(f) The external deceleration signal is invalid for the machine lock axis.
(g) External deceleration is valid even during incremental feed movement.
(h) External deceleration is invalid during the synchronous tap modal.
(i)
(j)
(k) External deceleration is valid during G28 in the automatic operation, or up to the dog on when
(l)
(m) When an inch command is issued, the axis moves at the speed obtained by converting the
(n) The external deceleration signal for the slave axis is invalid during synchronous control.
(o) External deceleration is invalid for the axis moving with chopping.
(p) External deceleration is invalid during thread cutting.
(q) The external deceleration signal is invalid for the virtual axis.
(r) During the manual speed command, the external deceleration signal is valid for the
(s) During manual random feed, the external deceleration axis is valid for the same axis and
(t)
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CHAPTER 2 MACHINE OPERATIONS
6. Operation Switch Functions and Other Functions
direction (+/–). The speed will decelerate when a signal in the direction matching the
movement direction is input.
immediately.
for which a signal matching the movement direction is input will decelerate.
matches the movement direction, the feedrate will be lowered to the external deceleration
speed.
parameter (control parameter: #320013 external deceleration invalid).
(G93) modals.
the external deceleration speed.
External deceleration is invalid during the tapping mode.
External deceleration is valid even during skip feed.
using the dog-type manual reference point return mode. Note that external deceleration is
invalid while creeping.
When calculating the machining time, the external deceleration signal input is not considered.
external deceleration speed into inches.
movement axis as well as the axis and direction that is the same as the selected feed axis
(+/–).
direction as the axis for which manual random feed is valid.
(If the manual random feed is valid for the axis but the movement amount is 0, the external
deceleration signal + for the same axis will be valid.)
During manual arc feed, the external deceleration signal for same axis and direction as the
selected feed axis (+/–) will be valid instead of the movement axis.
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