Mitsubishi MELSEC-A A1SD71-S2 User Manual page 32

(1
7)
Deceleration time lor an emergency stop
Sets the deceleration time (64 to 50000 msec, setting unit: 1 msec)
when there is an emergency stop during JOG, zero return, and posi-
tioning operations.
The deceleration time for an emergency stop must be
written in the
parameter area (buffer memory addresses
X
axis: address
7888
and Y
axis: address
7908)
using a sequence program. (Hexadecimal input)
When decelerating, designate either deceleration time or the usual
acceleration/deceleration time (addresses
X
axis:
7876,
Y
axis:
7896)
for an emergency stop to use positioning start data in the emergency
stop area (addresses X axis: 202, Y axis: 502).
Speed
V : Deceleration limit value
h
T
:
Accelerationldeceleration time
TO : Deceleration time for an emergency stop
Deceleration curve during stopping
Deceleration curve during an emergency stop
* T
I I
c
Time
d
L - 2 4
I
I
( T o
I I I
H
Emergency stop signal
STOP signal ON from the drive unit
PC READY signal (YZD)
OFF
Stop signals (Y25, Y26) ON from the PC CPU
Input of the BREAK key from the peripheral device or the STOP key
from an AO71TU
(1 8 ) Positioning mode
Sets the control mode when executing positioning.
The same positioning mode to the X axis and Y axis in a parameter area
(buffer memory address
7889)
must be written with a sequence pro-
gram.
Positioning control......... Positioning is done in the incre-
mode mental or absolute mode by an
address designated by the posi-
tioning data.
Speed/positioning Operation is started at the posi-
Positioning control switching
modes
tioning speed designated by the
mode positioning data. Then, it is
switched to positioning control in
accordance with the positioning
address when an external con-
trol switching signal is input.
Speed control mode....... The operation is started at the
positioning speed designated by
the positioning data.
The operation continues until a
stop signal is received.
;
Section
3.4.4
gives details about the positioning mode.
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