Skip to content

Latest commit

 

History

History
83 lines (62 loc) · 3.64 KB

Hardware.md

File metadata and controls

83 lines (62 loc) · 3.64 KB
Raw

Known good and bad configurations of hardware

Introduction

The typical setup is a Raspberry Pi with a USB to RS485/422 industrial serial port. RS422 is the port standard on Eversolar inverters, but RS485 ports can also communicate with the inverters when they are wired for half duplex.

http://i1360.photobucket.com/albums/r654/solmoller/eversolar_setup_zps34665aa4.jpg

Details

Cabling

Cabling can be done through cutting open a network cable and rewire according to the manual - or use a network crimper tool for a sturdy, nice looking solution

There are tools, that allow you to make the cabling work without custom tools, here is an example: https://github.com/solmoller/eversolar-monitor/blob/wiki/rj45_wiring.jpg?raw=true

(Search for rj45 wiring block to find products like the one in the picture)

Here's an example of how to connect an RS422 adapter

Eversolar pin colour Eversolar signal Description
1 yellow RXD+ Yellow RXD+ Input Data + (B) Input
2 white RXD- White RXD- Input Data – (A) Input
3 orange TXD+ Orange TXD+ Output Data + (B) Output
4 black gnd Black GND GND Device ground supply pin
6 red TXD- Red TXD- Output Data – (A) Output

You can interconnect additional Eversolar inverters with regular RJ45 network patch cables

Here's an example of how to connect an RS485 adapter

Eversolar pin Eversolar signal RS485
1 RXD+ Data +
2 RXD- Data –
3 TXD+ Data +
4 gnd GND
6 TXD- Data –

And another example

Eversolar Pin Colour Name RS 485 Pin Colour Name
1 Orange/white TX_A 3 Green/white RX_A
2 Orange TX_B 6 Green RX_B
3 Green/white RX_A 1 Orange/white TX_A
4 Blue GND 7 Brown/white GND
5 Blue/white GND 8 Brown GND
6 Green RX_B 2 Orange TX_B
7 NC 4 NC
8 NC 5 NC

Inverted polarity

A few users have accidentally switched plus and minus on their cabling, strangely, the Eversolar inverters reply, but unsuccessfull:

Sending: aa 55 01 00 00 00 10 00 00 01 10
received packet from inverter:
**95 55 ff ff ff** df f7 ff fd d7 00 95 55 ff ff ff df
ff ff fd df 00

The ff ff ff ff indicates the inverted polarity, they should be 00 00 00 00

Termination

There is debate on the necessity of termination, it appears not to be required with cable lengths under 10 meters

Known good computers

Raspberry Pi version B. Versions A, A+, B+ and 2 should work fine. Regular PC's are also used

Known good USB to RS422 ports

USB-RS422-WE-LLLL-CU

Known good USB to RS485 ports

FTDI based ports

http://www.ebay.co.uk/itm/USB-2-0-to-RS-485-RS485-RJ45-RJ-45-Serial-Adapter-Converter-FTDI-FT232-FT232R-/170792123589?

Known bad USB to RS485 ports

The pc-sintech adapter is known to ship with a faulty diode, the image links to a description on how to fix it

Known good ethernet to RS485

USR-TCP-RS232-300

ATC-1000 RS-485 to ethernet