Hello, I´m trying to query my SMA Inverters. When I query 2-4 values, the modbus server crashes always (i tried both Inverters). the poll rate is 10s [grafik] I think the problem could be that nodered queries them all at once, can I set somehow that the values are queried one after the other ? …

Hi Becker, Uninstall modbustcp node and use 'node-red-contrib-modbus' that has more advanced features. basically you use the modbus-flex-getter node with the following logic setup [image] your inject node will trigger every x amount of seconds the setup functions that will in turn send request …

Becker 12 September 2020 21:55 12

I doesn´t work this way.

where can I chose [1] ? after "join" a new function ?

Adding two values

Topic		Replies	Views
Modbus massive reading General modbus	12	415	18 August 2023
Handling a large number of Modbus registers General modbus	5	440	30 June 2023
Modbus query SMA Inverter - the right way General	34	4493	14 October 2020
read 2 spaces with node-red-contrib-modbustcp General	5	300	1 April 2023
Modbus Serial - Best way to request data General	5	264	6 June 2023

Copyright OpenJS Foundation and Node-RED contributors. All rights reserved. The OpenJS Foundation has registered trademarks and uses trademarks. For a list of trademarks of the OpenJS Foundation, please see our Trademark Policy and Trademark List. Trademarks and logos not indicated on the list of OpenJS Foundation trademarks are trademarks™ or registered® trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them.

Query modbus registers for SMA Inverter without crash

Related topics