Dear community members, I am trying to read some parameters from a Schneider Electric Smartlink SI D Power meter via Modbus TCP but I do not know how to read the Watthours, I can read the Voltage, Amperage, and Wattage, Those are of a Float32 format. The Modbus address for the Watthours is 3203 but …

I'm pretty sure that is not a JS or NODE error (i.e. looks like a user coding error) Can you share your flow? Ps, buffer size now looks correct.

The reading of the 64bit Int is working. The error is now that a later part of your flow cannot handle the BigInt object type that has been returned by redBigInt64BE. AS I said earlier, the BigInt object has some particular behaviours that will affect what you can do with it. You cannot treat it li…

hope this works, newer shared a flow before lol :wink:

please edit that and put code between 3 back ticks (it is unusable in current format) ``` like this ```

[ { "id": "e905007d.6be7b", "type": "tab", "label": "Flow 1", "disabled": false, "info": "" }, { "id": "ddb0454d.5233b8", "type": "modbus-getter", "z": "e905007d.6be7b", "name": "FC 3 [150] (3027) Voltage", "…

what version of nodejs are you using? at a command line terminal, enter node -v [image] knolleary: Support for reading 64bit ints from Buffers was added in Node 12

~Ah, so the join node or the http looks like its not liking the bigint?~ EDIT no - its part in the function

[image] Steve-Mcl: what version of nodejs are you using? @Steve-Mcl the flow is using readBigInt64BE so it must be node 12 or later. As I've already said, the problem here is what the flow is trying to do with the result of readBigInt64BE. @Job-Hoogeboom in your screenshot we can see the er…

that can be possible, it does seem like it reads the value correctly. [......PNG]

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ModBus TCP Read 64-bit registers

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Steve-Mcl 24 April 2020 09:31 19

what version of nodejs are you using?

at a command line terminal, enter node -v

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ModBus TCP Read 64-bit registers

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