each network. Incorrect output or malfunction due to a communication failure may result in an
accident.
When changing data from a peripheral device connected to the CPU module during operation,
configure an interlock circuit in the program to ensure that the entire system will always operate
safely. For other controls to a running programmable controller (such as program modification or
operating status change), read relevant manuals carefully and ensure the safety before the
operation. Especially, in the case of a control from an external device to a remote programmable
controller, immediate action cannot be taken for a problem on the programmable controller due to
communication failure. To prevent this, configure an interlock circuit in the program, and determine
corrective actions to be taken between the external device and CPU module in case of a
communication failure.
An absolute position restoration by the positioning function may turn off the servo-on signal (servo
off) for approximately 20ms, and the motor may run unexpectedly. If this causes a problem, provid
an electromagnetic brake to lock the motor during absolute position restoration.