Rievtech ELC Series - Page 241

EN
Programmable Relay ● User Manual for ELC, EXM and PR Series 241 2020 v6.0 ● © Rievtech Co.,
Ltd. ● www.rievtech.com
Subscribe with MQTT
Description of Function
You can use this function to allow the xLogic to subscribe to a message on the MQTT cloud server. Only 8 Subscribe blocks
can be placed in one program.
Once you have added it to your program, double-click the block to configure it.
Connection
Description
En
You enable/disable the block with the signal at input En (1/0).
Parameter
QoS Level:
QoS 0(no answer) or QoS 1(answer). If you wish to receive a response from the cloud server, select
‘QoS 1’.
Subscribe interval time:
Subscribe timer setting. If enabled, the xLogic will Subscribe to the message from the cloud server
every x seconds. If disabled, the message will only be subscribed to once.
Subscribe topic:
Fill in the topics you want to subscribe to.
However, it should be noted that the topic of the multiple subscribe blocks cannot be the same.
Parameter：
Set the start register to store the received information data.
Out 1
Digital output.
Indicates whether the information was successfully subscribed.
0: Not triggered or did not receive the topic it subscribed to
1: Received a subscription topic