Hello. I'm reading MODBUS holding registers. On register 0 the value is -35 (signed). If I show this value in gage the value is 65501 (unsigned). How can I show SIGNED INTEGER? Thanks. BR.

To use the data as in the debug then you can do, for each item in the array msg.payload[i] = (msg.payload[i] << 16) >> 16

farcry 24 April 2020 07:33 8

Collin.
Off topic question.
Do you have similar (simple) idea of how to show BCD formated numbers?
I have posted: OMRON BCD format
Thanks.
BR.

Topic		Replies	Views
Going crazy trying to read signed INT32 from buffer General node-red-dashboard	17	1132	19 January 2022
How to decode 16 bit unsigned integer General	21	5465	11 January 2021
Modbus: How to read 32 bit signed numbers General	4	1240	8 December 2021
Modbus negative numbers General	6	4605	18 October 2018
Processing int16 values General	43	1841	15 February 2021

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.

MODBUS 16bit SIGNED INTEGER

Related topics