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MELSEC-Q
12 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. 12.25 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.
•
A deceleration stop is carried out, and 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.
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]
Fig. 12.26 Speed change at new speed value "0"