Yaskawa MP2300S Basic Module - Manual (Page 306)

7.4 Precautions
7.4.1 Precautions on Usage
7-28
7.4 Precautions
7.4.1 Precautions on Usage
„
When using the slave CPU synchronous function, the slave side cannot use option module PO-01.
To use PO-01, disable the slave CPU synchronous function.
„
In the transient condition from asynchronous to synchronous state using the slave CPU synchro-
nous function, a slave-side scan cycle (high/low speed) may be delayed by up to one scan cycle.
For an application which requires fixed timing and fixed cycles, take preventative measures if using
any data that would affect the timing of such an application.
„
When an SVA-01 is attached to a slave side optional slot, and the slave CPU synchronous state is
entered, the operation may suffer such an impact that an axis is shocked. Stop the SVA-01 opera-
tion in advance.
„
When an SVB-01 is attached to a slave side optional slot, during transition to the slave CPU syn-
chronous state, disconnect and later reconnect the communication between a slave and its con-
nected SVB-01. When a slave device such as a servo or inverter is connected, stop their operation
in advance. Due to the disconnection of communications, the device may suffer shock when an axis
is suddenly stopped.
„
The operations below change the slave CPU synchronous state to the asynchronous state:
[Master side operation]
• Change of an H scan setting
• Saving of a MECHATROLINK communications definition
• Self-configuration
[Slave side operation]
• Change of an H scan setting
• Self-configuration
While recovering to the slave CPU synchronous state, a scan cycle disturbance may occur.
„
When a communication error occurs, the condition changes from slave CPU synchronous to asyn-
chronous state.
„
When the MP2300S with a built-in SVB is changed from slave to master, flash save the change and
turn ON the power again.
„
The slave CPU synchronous function is available only when the MP2000 series SVB is used as a
master. When connected to another master controller, it works in asynchronous mode.