# HOW TO READ DATA FROM Panasonic PLC to Node-Red

**URL:** https://discourse.nodered.org/t/how-to-read-data-from-panasonic-plc-to-node-red/14515
**Category:** General
**Created:** [20 August 2019 04:16 UTC](https://discourse.nodered.org/t/how-to-read-data-from-panasonic-plc-to-node-red/14515 "2019-08-20T04:16:03Z")
**Posts on this page:** 6
**Page:** 1

<div class="post-metadata">

### Author: ![seamy](https://avatars.discourse-cdn.com/v4/letter/s/ac91a4/32.png) [@seamy](https://discourse.nodered.org/u/seamy)
#### Post date: [20 August 2019 04:16 UTC](https://discourse.nodered.org/t/how-to-read-data-from-panasonic-plc-to-node-red/14515/1 "2019-08-20T04:16:03Z")

</div>

Hello world, i wanna ask how to read data from plc to node red. i used the RS485 usb converter to connect it to Raspberry Pi. And i just install the modbus rtu palette for its communication but, how to read all data from the rs485 to node red . i also got this /dev/ttyUSB0

 ![photo6260197073857128583](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/2X/1/160fe9cd8211396cc82f7cd865b24c04cfa9d9a1.jpeg)

---

<div class="post-metadata">

### Author: ![seamy](https://avatars.discourse-cdn.com/v4/letter/s/ac91a4/32.png) [@seamy](https://discourse.nodered.org/u/seamy)
#### Post date: [20 August 2019 05:30 UTC](https://discourse.nodered.org/t/how-to-read-data-from-panasonic-plc-to-node-red/14515/2 "2019-08-20T05:30:07Z")

</div>

![photo6260254759562881279](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/2X/8/88c5f43e39ebc1f8703e4cd1dd1a3a473df14d2f.jpeg)

---

<div class="post-metadata">

### Author: ![seth350](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/seth350/32/4617_2.png) [@seth350](https://discourse.nodered.org/u/seth350)
#### Post date: [21 August 2019 02:41 UTC](https://discourse.nodered.org/t/how-to-read-data-from-panasonic-plc-to-node-red/14515/3 "2019-08-21T02:41:17Z")

</div>

Panasonic..._shutter_

First thought I had was if that RS485 to USB converter is compatible with Linux. It very well may not.

You should be able to pull a serial in/out node in and send it some commands and see if you get a response.

There is a modbus message structure you would have to inject.

 ![image](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/2X/4/444d8384cb98583f51cf0b933dba3ead48e96b9b.jpeg) [https://www.picotech.com/images/uploads/library/topics/\_med/modbus-frame-structure.jpg](https://www.picotech.com/images/uploads/library/topics/_med/modbus-frame-structure.jpg)

---

<div class="post-metadata">

### Author: ![thatcadguy](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/thatcadguy/32/5273_2.png) [@thatcadguy](https://discourse.nodered.org/u/thatcadguy)
#### Post date: [21 August 2019 04:31 UTC](https://discourse.nodered.org/t/how-to-read-data-from-panasonic-plc-to-node-red/14515/4 "2019-08-21T04:31:09Z")

</div>

Try the node-red-contrib-modbus package -- will have everything you need for both Modbus RTU and TCP.

---

<div class="post-metadata">

### Author: ![seamy](https://avatars.discourse-cdn.com/v4/letter/s/ac91a4/32.png) [@seamy](https://discourse.nodered.org/u/seamy)
#### Post date: [21 August 2019 05:41 UTC](https://discourse.nodered.org/t/how-to-read-data-from-panasonic-plc-to-node-red/14515/5 "2019-08-21T05:41:25Z")

</div>

I already installed the palette, but i dont know how to setup its node flow. And should i need to get its serial code first for i/o data?

---

<div class="post-metadata">

### Author: ![thatcadguy](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/thatcadguy/32/5273_2.png) [@thatcadguy](https://discourse.nodered.org/u/thatcadguy)
#### Post date: [21 August 2019 13:17 UTC](https://discourse.nodered.org/t/how-to-read-data-from-panasonic-plc-to-node-red/14515/6 "2019-08-21T13:17:33Z")

</div>

Have you tried the wiki? [https://github.com/biancode/node-red-contrib-modbus/wiki](https://github.com/biancode/node-red-contrib-modbus/wiki)