Rievtech ELC Series - Page 240

EN
Programmable Relay ● User Manual for ELC, EXM and PR Series 240 2020 v6.0 ● © Rievtech Co.,
Ltd. ● www.rievtech.com
MQTT Publish Status Codes
Code
Description
00
Connection Accepted
51
Connection Refused: unacceptable protocol
version
52
Connection Refused: identifier rejected
53
Connection Refused: server unavailable
54
Connection Refused: bad username or
password
55
Connection Refused: not authorized
2
Wait to connect to the server.
3
The PING data packet is being sent.
4
Time to time start send the published data to
the server and wait for server response
(QoS1).
5
Timeout – Disconnect and retry server
connection.
13
MQTT PING success
14
Successful response to server response
(QoS1) .
255
Successful connection to the server and ready
to Publish.
Subscribe to Topic_PLC/1 and Topic_PLC/2 on the MQTT
client software MQTT.fx.
Press the up button on the LCD panel to trigger the
publish blocks, see the online monitoring screenshot
below:
You will receive two messages on the MQTT.fx software:
Topic_PLC/1 content:
Topic_PLC/2 content：
This indicates that the PLC successfully published
information to the MQTT server.