# Convert Array to a number
**URL:** https://discourse.nodered.org/t/convert-array-to-a-number/89579
**Category:** General
**Created:** [17 July 2024 18:54 UTC](https://discourse.nodered.org/t/convert-array-to-a-number/89579 "2024-07-17T18:54:40Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@xfear1](https://discourse.nodered.org/u/xfear1)
#### Post date: [17 July 2024 18:54 UTC](https://discourse.nodered.org/t/convert-array-to-a-number/89579/1 "2024-07-17T18:54:40Z")
Hi!
I'm having a problem to convert a value my PLC is sending with modbus, is says its in array, but I need to use this value to write on a chart, I don't know if I need to convert to number to be able to write in the chart, but thats what I think is the way to work.
I tried to convert the value the modbus is sending with this following function but is not working:
msg.payload = Number(msg.payload)
return msg;
Anyone can help? Do I need to convert the value from array to number to write on the chart or don't? If not why is not working?
If I need to convert the value to number, can anyone tell me how to do it?
---
### Author:  [@AndyO](https://discourse.nodered.org/u/AndyO)
#### Post date: [17 July 2024 19:15 UTC](https://discourse.nodered.org/t/convert-array-to-a-number/89579/2 "2024-07-17T19:15:06Z")
Can you show debug1 as complete msg object?
- you can try for function:
```auto
msg.payload = msg.payload[0]
return msg;
```
---
### Author:  [@xfear1](https://discourse.nodered.org/u/xfear1)
#### Post date: [17 July 2024 19:23 UTC](https://discourse.nodered.org/t/convert-array-to-a-number/89579/3 "2024-07-17T19:23:10Z")
Yes.
Changed the debug to complete.
And then changed it back to normal and changed the function code to what you suggested.
---
### Author:  [@AndyO](https://discourse.nodered.org/u/AndyO)
#### Post date: [17 July 2024 19:41 UTC](https://discourse.nodered.org/t/convert-array-to-a-number/89579/4 "2024-07-17T19:41:05Z")
I think response from both ports is different:
this will work on first node
```auto
msg.payload = msg.payload[0]
return msg;
```
this will work on second node
```auto
msg.payload = msg.payload.data[0]
return msg;
```
---
### Author:  [@xfear1](https://discourse.nodered.org/u/xfear1)
#### Post date: [17 July 2024 20:16 UTC](https://discourse.nodered.org/t/convert-array-to-a-number/89579/5 "2024-07-17T20:16:09Z")
It worked, thank you!
My chart is reading the values as it should, just one thing, is there a way to filter the value anything above 0?
I see there is the polling rate of my modbus reading but i need that reading the entire time waiting for the value to come.
Is there a function I can write like If value \> 0 then pass the information?
---
### Author:  [@system](https://discourse.nodered.org/u/system)
#### Post date: [15 October 2024 20:16 UTC](https://discourse.nodered.org/t/convert-array-to-a-number/89579/6 "2024-10-15T20:16:22Z")
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