YASKAWA MP3000 Series Setup Manual page 141

4.1 User Program Types and Execution Timing
4.1.1 Ladder Programs
Setting Value:
Current Value:
Maximum Value: The maximum processing time for the scan is displayed. You can set the maximum
Enter the high-speed scan time in the Setting Value Box under High-speed Scan. Enter
4.
the low-speed scan time in the Setting Value Box under Low-speed Scan.
The following table shows the possible set values and default values for each scan time.
High-speed Scan Time
Low-speed Scan Time
Note: The possible set values and default values depend on the model. Refer to the user's manual for the Mod-
5.
Click the OK Button.
The settings will be saved and the Environment Setting Dialog Box will close.
Important
4-8
Enter the scan time settings.
A value of 0.0 ms is displayed when the MPE720 is offline. Otherwise, the actual
processing times for the scans are displayed.
value. The setting is retained until it is exceeded.
Item
ule you are using for details.
Observe the following precautions when setting the high-speed scan time and low-speed
scan time.
1. Set the scan set value so that it is 1.25 times greater than the maximum value.
If the scan set value is too close to the maximum value, the refresh rate of the MPE720 window
will noticeably drop and can cause communications timeout errors to occur. If the maximum
value exceeds the scan set value, a watchdog error may occur and cause the Machine Con-
troller system to shut down.
2. If you are using MECHATROLINK-II or MECHATROLINK-III, set values that are an integral mul-
tiple of the communications cycle. If you change the communications cycle, check the scan
time set values.
3. Do not change the scan set value while the Servo is ON. Never change the scan set value
while an axis is in motion (i.e., while the motor is rotating). Doing so may cause the motor to
rotate out of control.
4. After changing or setting a scan time, always save the data to flash memory.
Possible Set Values
0.125 to 32 ms (in 0.125-ms increments)
2.0 to 300.0 ms (in 0.5-ms increments)
Default
4.0 ms
200.0 ms