Omron CS1W-MC221 - 02-2008 Operation Manual page 377

Override Function
Override in CP Control
Setting an Override
PLC Interface Area
Name MCU Model
Override MC421
MC221
Override Setting MC421
MC221
350
fast. For example, if the override is set to 50%, the travel speed drops to half
the maximum feed rate.
Speed
Maximum
feed rate
Designated
feed rate
Acceleration
time
The acceleration remains constant even if the speed is changed by using the
override function. As a result, both the acceleration time and the deceleration
time are proportionally reduced.
In interpolation control, the designated interpolation feed rate is used as the
maximum feed rate. The override for the interpolation feed rate can be set to a
value between 0.1% and 199.9%. If the result set by using the override func-
tion to over 100% exceeds the maximum interpolation feed rate, the maximum
interpolation feed rate is used instead.
Example: Execution in Stop Mode
Speed
270
Override
Note With linear or circular interpolation in either the Pass Mode or the In-position
Check OFF Mode, the speed cannot be changed in real time during operation.
To execute an override, set the override in the PLC Interface Area and turn
ON the Override Setting Bit. The override will then be applied to subsequent
operations.
Word
X axis Y axis Z axis
n+10 n+12 n+14
n+6 n+8 ---
n+11 n+13 n+15
n+7 n+9 ---
Even if an override is set for a given axis, it will be disabled if the Override Set-
ting Bit is turned OFF.
Override: 100%
Change in the
override
Override: 50%
Constant
speed time
Bits
U axis
n+16 00 to 15 Override (4 digits hex)
--- Setting range: 0001 to 07CF hex
(0001 to 1999: 0.1 to 199.9%)
n+17 12 1: Override enabled
--- 0: Override disabled
Section 6-12
Time
Deceleration
time
Feed: 150 x 1.8 = 270
Time
Description