Mitsubishi Electric MELSEC-L Series, User Manual

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13 - 43
Chapter 13 Control Sub Functions
(3) When the stop command was given to make a stop after a speed change
that had been made during position control, the restarting speed depends
on the "
Cd.14
New speed value
".
V
t
Speed change
command
Stop command
Restarting
command
Cd. 14 New speed value
Command speed Da. 8
Fig. 13.22 Restarting speed after speed change made during position control
(4) When the speed is changed by setting "
Cd.14
New speed value
" to "0", the
operation is carried out as follows.
 When "
Cd.15
Speed change request
" is turned ON, the speed change 0 flag
(
Md.31
Status
: b10) turns ON.
(During interpolation control, the speed change 0 flag on the reference axis
side turns ON.)

The axis stops, but "
Md.26
Axis operation status
" does not change, and the
BUSY signal remains ON. (If a stop signal is input, the BUSY signal will
turn OFF, and "
Md.26
Axis operation status
" will change to "stopped".)
In this case, setting the "
Cd.14
New speed value
" to a value besides "0" will
turn OFF the speed change 0 flag (
Md.31
Status
: b10), and enable
continued operation.
[LD77MS4 operation example]
( Md. 31 status: b10)
Positioning start signal
BUSY signal
Cd. 14 New speed value
Cd. 15 Speed change request
Positioning operation
1000
0
ON
OFF
ON
OFF
ON
OFF
ON
OFF
Speed change 0 flag
[Y10, Y11, Y12, Y13]
[XC,XD,XE,XF]
(Note): Refer to Section 3.3 for input/output signal of LD77MS16.
Fig. 13. 23 Speed change at new speed value "0"