# Problem sending FLOAT data and DW with MCprotocol
**URL:** https://discourse.nodered.org/t/problem-sending-float-data-and-dw-with-mcprotocol/75807
**Category:** General
**Created:** [27 February 2023 11:40 UTC](https://discourse.nodered.org/t/problem-sending-float-data-and-dw-with-mcprotocol/75807 "2023-02-27T11:40:11Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@Seadiver](https://discourse.nodered.org/u/Seadiver)
#### Post date: [27 February 2023 11:40 UTC](https://discourse.nodered.org/t/problem-sending-float-data-and-dw-with-mcprotocol/75807/1 "2023-02-27T11:40:11Z")
Hi
I'm setting up a Node-red project were I need to be able to send and receive data from a Mitsubishi FX5 CPU.
Reading data is not an issue but I am struggling with writing data. I can not figure out how to write to a double word. I have tried to use the buffer maker but when I do it only uses 8bits in the first D100 then start to write values in the first 8bits in the following D101
When I tried to write to DFLOAT100 I only get error massage that FLOAT is an unknown data type.
Reading DFLOAT100 is not an issue.
Also I get an error message that I am not able to solve
Any suggestions?
---
### Author:  [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)
#### Post date: [27 February 2023 12:47 UTC](https://discourse.nodered.org/t/problem-sending-float-data-and-dw-with-mcprotocol/75807/2 "2023-02-27T12:47:56Z")
Can you share a minimal flow that demonstrates reading & writing (even if it doesnt work)
Use CTRL-E to export & paste exported JSON into a code block
`````
`like this (with three backticks above and below)`
`````
---
### Author:  [@Seadiver](https://discourse.nodered.org/u/Seadiver)
#### Post date: [27 February 2023 13:18 UTC](https://discourse.nodered.org/t/problem-sending-float-data-and-dw-with-mcprotocol/75807/3 "2023-02-27T13:18:48Z")
```auto
[
{
"id": "76ed1cc676370a68",
"type": "ui_text_input",
"z": "4f2d5c1695e19232",
"name": "",
"label": "Skalfaktor längsmätning",
"tooltip": "",
"group": "b6a6a1b52b807232",
"order": 1,
"width": 0,
"height": 0,
"passthru": true,
"mode": "number",
"delay": "300",
"topic": "topic",
"sendOnBlur": false,
"className": "",
"topicType": "msg",
"x": 1270,
"y": 1540,
"wires": [
[
"767ea1365f589945"
]
]
},
{
"id": "7e496d8df19b85e1",
"type": "ui_text_input",
"z": "4f2d5c1695e19232",
"name": "",
"label": "Kalibreringslängd",
"tooltip": "",
"group": "24850439ce118377",
"order": 1,
"width": 0,
"height": 0,
"passthru": true,
"mode": "number",
"delay": 300,
"topic": "topic",
"sendOnBlur": true,
"className": "",
"topicType": "msg",
"x": 1210,
"y": 1620,
"wires": [
[
"f39ceb74ceda6797"
]
]
},
{
"id": "767ea1365f589945",
"type": "range",
"z": "4f2d5c1695e19232",
"minin": "0",
"maxin": "1",
"minout": "0",
"maxout": "10000",
"action": "scale",
"round": false,
"property": "payload",
"name": "",
"x": 1520,
"y": 1540,
"wires": [
[
"9efb8842c99c0a8a"
]
]
},
{
"id": "9efb8842c99c0a8a",
"type": "MC Write",
"z": "4f2d5c1695e19232",
"name": "Skicka D110",
"topic": "",
"connection": "426b02f1df50ef3c",
"data": "payload",
"address": "D110",
"addressType": "str",
"dataType": "msg",
"errorHandling": "throw",
"outputs": 1,
"x": 1730,
"y": 1540,
"wires": [
[]
]
},
{
"id": "0624efac02bb32ef",
"type": "MC Write",
"z": "4f2d5c1695e19232",
"name": "Skicka DFLOAT125",
"topic": "",
"connection": "426b02f1df50ef3c",
"data": "payload",
"address": "DFLOAT125",
"addressType": "str",
"dataType": "msg",
"errorHandling": "throw",
"outputs": 1,
"x": 1750,
"y": 1620,
"wires": [
[
"f0e49ca02da29e83"
]
]
},
{
"id": "4d6e9aaa2d757a67",
"type": "buffer-maker",
"z": "4f2d5c1695e19232",
"name": "",
"specification": "spec",
"specificationType": "ui",
"items": [
{
"name": "D125",
"type": "floatle",
"length": 2,
"dataType": "msg",
"data": "D125"
}
],
"swap1": "",
"swap2": "",
"swap3": "",
"swap1Type": "swap",
"swap2Type": "swap",
"swap3Type": "swap",
"msgProperty": "payload",
"msgPropertyType": "str",
"x": 1510,
"y": 1620,
"wires": [
[
"0624efac02bb32ef",
"5f315c4fc789063c"
]
]
},
{
"id": "f0e49ca02da29e83",
"type": "debug",
"z": "4f2d5c1695e19232",
"name": "debug 148",
"active": true,
"tosidebar": true,
"console": false,
"tostatus": false,
"complete": "false",
"statusVal": "",
"statusType": "auto",
"x": 1950,
"y": 1620,
"wires": []
},
{
"id": "5f315c4fc789063c",
"type": "debug",
"z": "4f2d5c1695e19232",
"name": "debug 149",
"active": true,
"tosidebar": true,
"console": false,
"tostatus": false,
"complete": "false",
"statusVal": "",
"statusType": "auto",
"x": 1750,
"y": 1700,
"wires": []
},
{
"id": "f39ceb74ceda6797",
"type": "change",
"z": "4f2d5c1695e19232",
"name": "",
"rules": [
{
"t": "set",
"p": "D125",
"pt": "msg",
"to": "payload",
"tot": "msg",
"dc": true
}
],
"action": "",
"property": "",
"from": "",
"to": "",
"reg": false,
"x": 1440,
"y": 1720,
"wires": [
[
"4d6e9aaa2d757a67"
]
]
},
{
"id": "b6a6a1b52b807232",
"type": "ui_group",
"name": "Extra",
"tab": "89790f01f5014aca",
"order": 4,
"disp": true,
"width": "6",
"collapse": false,
"className": ""
},
{
"id": "24850439ce118377",
"type": "ui_group",
"name": "Kalibrering",
"tab": "89790f01f5014aca",
"order": 4,
"disp": true,
"width": "6",
"collapse": false,
"className": ""
},
{
"id": "426b02f1df50ef3c",
"type": "MC Protocol Connection",
"name": "PLC",
"host": "192.168.246.12",
"port": "1025",
"protocol": "UDP",
"frame": "4E",
"plcType": "QnA",
"ascii": false,
"PLCStation": "",
"PCStation": "",
"PLCModuleNo": "",
"network": "",
"octalInputOutput": false,
"timeout": "10000"
},
{
"id": "89790f01f5014aca",
"type": "ui_tab",
"name": "Inställningar",
"icon": "settings",
"order": 2,
"disabled": false,
"hidden": false
}
]
```
Like this?
---
### Author:  [@system](https://discourse.nodered.org/u/system)
#### Post date: [28 April 2023 13:19 UTC](https://discourse.nodered.org/t/problem-sending-float-data-and-dw-with-mcprotocol/75807/4 "2023-04-28T13:19:40Z")
This topic was automatically closed 60 days after the last reply. New replies are no longer allowed.