How to div Values from in multiple output function arrary

General
1

I have Written a code in function ( Multiple output ) as below which receives the data through modbus

var msg0 = {payload:(msg.payload[0]<<16) + msg.payload[1]};
var msg1 = {payload:(msg.payload[2]<<16) + msg.payload[3]};
return [msg0,msg1];

i'm getting msg0 output of function as as 4145 but i required 41.45. Kindly suggest what code to be written to get the expected output as 41.45.

2

Divide it by 100

var msg0 = {payload: ((msg.payload[0]<<16) + msg.payload[1]) / 100};
var msg1 = {payload: ((msg.payload[2]<<16) + msg.payload[3]) / 100};
return [msg0,msg1];

At a guess, you are working with modbus data? If so, there is a contrib node designed to help with all the 16 bit / 32 bit / float / masking / bit shifting etc - makes this a trivial and low code experience - node-red-contrib-buffer-parser

1 Like
3

Dear Steve,

Thanks for the reply.

Yes. We are working MODBUS DATA through ABB AC500 Controller

In Still getting the same out.

4

can you share the values coming out of the modbus node AND the values you expect them to become?

(add a debug node set to show complete message & use the copy value button to grab a copy of the entire message)

5

Hi ,

The Values are coming as below.

Values 1: 32768 ,
Values 2:17357
Value coming : 412.
Expected Value : 4.12

6

Hi could you try again please. Set the debug to show complete message & use the copy value button...

7

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