Mitsubishi Electric MELDAS C6 Interface Manual page 214

B con-
Signal name
tact
EXTERNAL DECELERATION
*
+ nTH AXIS
[Function]
The feedrate when the control axis is moving in the + direction can be forcibly controlled while this
signal (*+EDTn) is OFF, at a constant speed set with the parameters.
This signal is present for each control axis. The end numbers in the signal name indicate the control
axis No.
*+EDTn
1 : The 1st axis is decelerated.
2 : The 2nd axis is decelerated.
:
14 : The 14th axis is decelerated.
[Operation]
During manual mode when the "External deceleration" signal (*+EDTn) turns OFF, each axis
decelerates independently. However, during automatic mode, all axes will decelerate at the same
deceleration speed when even one axis matches the external deceleration conditions. The
deceleration occurs when the movement axis direction matches the external deceleration signal
direction of the corresponding axis.
(1) The external deceleration speed can be randomly set with the parameters. (#1216 extdcc)
(2) When the speed is less than the external deceleration speed, it will not be affected even if this
signal is OFF.
(3) The deceleration speed during automatic operation will be the combined deceleration speed, if
the deceleration conditions match and the external deceleration speed is exceeded.
(4) When returning in the reverse direction, the speed will immediately return to the correct
command speed.
(5) For G28, G29 and G30 commands, the speed will become the external deceleration speed for
that axis only, even in automatic operation.
(6) The speed will become the external deceleration speed even in rapid traverse during
synchronous tapping.
Axis movement
External deceleration (*+EDTn)
External deceleration (*-EDTn)
[Caution]
(1) The external deceleration signal is handled as a B contact (*) signal, but changes to 1 (ON) in
C6/C64 when the power is turned ON. When not being used, it is not necessary be concerned
with external deceleration when programming.
B con-
Signal name
tact
EXTERNAL DECELERATION
*
- nTH AXIS
[Function] [Operation]
The functions and operations of this signal are the same as those of "External deceleration (+) nth
axis" signal (*+EDTn). The deceleration occurs when the movement is in the minus direction and
the "External deceleration (-) nth axis" signal (*-EDTn) is OFF.
6. EXPLANATION OF INTERFACE SIGNALS
6.3 PLC Output Signals (Bit Type: Y***)
Signal
abbreviation
*+EDTn
:
+ direction movement
Signal
abbreviation
*-EDTn
6-3-17
1st axis 2nd axis
Y443 Y473
External deceleration speed
*-EDTn is invalid during + direction movement
1st axis 2nd axis
Y444 Y474
3rd axis
Y4A3
3rd axis
Y4A4