In my last post I’ve explained how I got RS485 working on a BeagleBone Green. Since then I managed to build a Modbus TCP to Modbus RTU gateway based on that and want to show how it works.
I started playing around with the images i’ve scanned and with a little GIMP magic i was able to create a useful overlay image.
And here we go with part 2 of my DQ860MA reverse engineering project!
As announced in one of my last posts i will try to reverse engineer the DQ860MA. Unfortunately i realized that the PCB is a 4 layer PCB, which makes it way harder to get a schematic.
So as a start i will get a list of all components.
I use clonezilla a lot to load images onto computers or create backups of them and it was always a hassle to enter the same values into the diolog over and over again. Unfortunately the documentation is not the very best.
Anyway, with a lot of googling and trail and error i finally got a semi automatic configuration.
You have to modify 3 files for booting EFI machines as well as BIOS based ones.
I’ve bought 4 large stepper motors and 4 DQ860MA drivers on ebay a few days ago. Unfortunately one was faulty from the beginning. The seller sent me a new one winthin 2 days which is awesome, but the best part is that i hadn’t to return the damaged one!
So i decided that there are pepole out there who for sure are interested in a teardown :-)
I had two identical computers of which one had a damaged Windows 7 installation that refused to boot. The other was a spare machine for that case, but unfortunately it wasn’t updated for about 2 years. So I had to install about 200 Updates which was really annoying.
After all the updates were installed I decided to make an image of the up-to-date computer and restore it on the damaged one.
Since I’m a big fan of open source tools, I wanted to use one and decided to use Clonezilla. The biggest problem with Clonezilla is that it does not support creating images of Software/Fake Raid’s/Firmware RAID’s according to their website.
My computers both have 2 SSD disks with 120GB each configured as RAID1. The RAID controller is the one provided by the Intel X79 chipset of the ASUS P9X79 Pro Mainboards, which is a Firmware RAID.
Last week i tried to read and write data to and from a SICK FlexiSoft Safty controller which has a Modbus/TCP gateway.
Because i had a lot of trouble to get that up and running i decided to write a few lines about i managed to solve my problems.