4.1 User Program Types and Execution Timing
4.1.1 Ladder Programs
4-8
Setting Value:
Enter the scan time settings.
Current Value:
A value of 0.0 ms is displayed when the MPE720 is offline. Otherwise, the actual
processing times for the scans are displayed.
Maximum Value: The maximum processing time for the scan is displayed. You can set the maximum
value. The setting is retained until it is exceeded.
4.
Enter the high-speed scan time in the
Setting Value
Box under
High-speed Scan
. Enter
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.
Note: The possible set values and default values depend on the model. Refer to the user’s manual for the Mod-
ule you are using for details.
5.
Click the
OK
Button.
The settings will be saved and the Environment Setting Dialog Box will close.
Item
Possible Set Values
Default
High-speed Scan Time
0.125 to 32 ms (in 0.125-ms increments)
4.0 ms
Low-speed Scan Time
2.0 to 300.0 ms (in 0.5-ms increments)
200.0 ms
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.
Important
Содержание MP3000 Series
Страница 153: ...4 1 User Program Types and Execution Timing 4 1 2 Motion Programs 4 20 Ladder Program Example...
Страница 212: ...5 4 Tuning 5 70 5 4 1 Using SigmaWin When Using a Servo 5 70 5 4 2 Using DriveWizard Plus When Using an Inverter 5 70...
Страница 274: ...5 3 Monitoring Machine Operation 5 3 3 Realtime Tracing 5 64...