Mqtt Communication Function - Mitsubishi Electric MELSEC iQ-F Series User Manual

MQTT communication function

Function overview
This function enables information (for example, input from sensors) collected on a programmable controller to be published
(sent) to an MQTT broker (on the cloud or on a local network) and such information to be subscribed (received) from the
MQTT broker.
MQTT is a lightweight, simple protocol and most suitable for devices with limited processing performance or limited
communication bandwidth. Communications become possible under conditions in which the network is unstable or the
devices have low communication performance, such as Machine to Machine (M2M) communication and Internet of Things
(IoT) communication.
MQTT is an OASIS standard communication protocol using a Publish/Subscribe message exchange model.
This product works as a client in MQTT communication and uses module function blocks in ladder programs to publish/
subscribe messages to an MQTT broker. In addition, secure communication encrypted with TLS (MQTTS) is also supported.
MQTT Publisher
(client)
MQTT gateway
or another device
Ethernet module
(1)
(1) Publish input from sensors or other information to an MQTT broker.
(2) MQTT broker on the cloud or on a local network
(3) Subscribe information from an MQTT broker and use the information to enable data logging, output control, and other operations.
4 FUNCTION LIST
46
4.3 Other Functions
MQTT Broker
(server)
Publish
Cloud
Subscribe
(2)
MQTT Subscriber
(client)
Personal computer
or another device
Ethernet module
(3)