15 MECHATROLINK-III Synchronization between Modules
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YASKAWA America, Inc. MP3200iec Hardware Manual YAI-SIA-IEC-5
Timing at Which Modules Are Synchronized
Modules are automatically synchronized when the power supply is cycled.
If you perform any of the following operations after turning ON the power supply, save the settings to flash memory and
then cycle the power supply again.
• When operation changes from asynchronized to synchronized as a result of changing the communications cycle
• When operation changes from synchronized to asynchronized or from asynchronized to synchronized as a result of
changing the high-speed scan setting
Changing Synchronization Cycles
When the scan cycle is changed, MECHATROLINK communications with all slave stations connected to the SVC32 are
reset. Operation automatically changes to synchronized when communications are restored.
MECHATROLINK communications continue for all other Modules.
Changing the MECHATROLINK Communications Cycle
Operation is automatically synchronized as long as the high-speed scan setting is an integral multiple of the
communications cycle.
It is not necessary to cycle the power supply.
NOTICE
1. When you change the MECHATROLINK cycle, do so either with the CPU Function Module stopped or when motion commands are not being
executed. Otherwise, application operations may be affected.
2. When changing the MECHATROLINK setting, the following operation will occur because MECHATROLINK communications are reset.
• Position information and zero point return completion information for Servo axes will be lost.
NOTICE
If asynchronous operation is set as a result of changing the communications cycle, an alarm will occur for the Servo
axis and an I/O error will occur for the I/O station. If this happens, change the setting back to synchronized, save the
settings to flash memory, and then cycle the power supply.
