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- FAQ > Controllers > Programmable Controllers MELSEC > MELSEC iQ-F Series > Regarding the QoS function of the MQTT Communication function
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- Inquiries
Regarding the QoS function of the MQTT Communication function
What are the different levels of QoS function?
Answer
There are three QoS levels and FX5-ENET is also supported.
・QoS0 - The message is sent only once from the source client.
Messages are not guaranteed to arrive at the destination.
・QoS1 - The message is retransmitted until it reaches the destination client.
Duplicate messages may arrive at the destination.
・QoS2 - Messages are delivered so that they reach the destination client only once.
・QoS0 - The message is sent only once from the source client.
Messages are not guaranteed to arrive at the destination.
・QoS1 - The message is retransmitted until it reaches the destination client.
Duplicate messages may arrive at the destination.
・QoS2 - Messages are delivered so that they reach the destination client only once.
*The higher the QoS level, the more accurate the message and the higher the quality, but the higher the number of communications, the higher the communication load.
- Product Name
- FX5-ENET
- Product Category
- Network/Communication
- Series
- MELSEC iQ-F Series
