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What does the error "Write Queue Overflow" mean on the Magelis HMI?

In Vijeo Designer, there is a write queue that can hold up to 100 write requests. If the PLC is too slow to process these write packets, the error will be displayed to inform that the writes are not making it to the PLC.

Typical causes of this error are a slow baud rate and too many actions writing too often. Check if your periodic actions are running too fast for the PLC to catch up.
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