Mitsubishi Electric Q12DCCPU-V User Manual page 4

[Setup and Maintenance Precautions]
Configure safety circuits external to the C Controller module to ensure that the entire system
operates safely even when a fault occurs in the external power supply or the C Controller module.
For the following controls, configure an interlock circuit in the user program to ensure that the entire
system will always operate safely.
(1) Changing data of the running C Controller module from the development environment (personal
computer) connected
(2) Changing the operating status
(3) Operating from the development environment (personal computer)
Especially, in the case of control from an external device to a remote C Controller module, immediate
action cannot be taken for a problem on the C Controller module due to a failure of data
communication.
To prevent this, configure an interlock circuit in the user program, and determine corrective actions to
be taken between the external device and C Controller module in case of a failure of data
communication.
Before performing online operations (especially, program modification, forced output, and operation
status change) for the running C Controller module from the peripheral connected, read relevant
manuals carefully and ensure the safety.
Improper operation may damage machines or cause accidents.
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WARNING
CAUTION