Raspberry Pi: Difference between revisions
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Send a mail to '''support@axelsw.it''' with the file '''''HardwareID.txt''''' of your device, generated in the directory '''/data/plc''' | Send a mail to '''support@axelsw.it''' with the file '''''HardwareID.txt''''' of your device, generated in the directory '''/data/plc''' | ||
Axel will send you the '''LLExec.key''' file related to your hardware. | Axel will send you the '''LLExec.key''' file related to your hardware. | ||
Install the license overwriting the file in the directory '''/data/plc''' with | |||
the one sent by Axel and reboot the system, | Install the license overwriting the file in the directory '''/data/plc''' with the one sent by Axel and reboot the system, | ||
The PLC should be started, you can now download out lates LogicLab automation | The PLC should be started, you can now download out lates LogicLab automation | ||
suite, and connect to your target. | suite, and connect to your target. | ||
Revision as of 17:44, 17 October 2016
Following these instructions, you can turn your Raspberry PI B or B+ into a complete IEC-61131 PLC.
Hardware Setup
The LLExec PLC runtime has been tested on Raspberry PI Model B and B+, Raspberry PI 2 model B and Raspberry PI 3 model B, with I/O expansions PIFace or PIFace Digital 2, depending on the model of Raspberry PI. The runtime PLC runs even without I/O expansion, it can be used to drive standard fieldbus modules, following the Modbus TCP standard. It also requires an SD or uSD at least 8GB to program the modified Raspbian image.
Software Setup
You can proceed in two alternative ways:
- (3) Program a SD or uSD card with a full Raspbian image, already configured to run LLExec PLC runtime.
- (4) Install LLExec PLC runtime on a standard Raspbian image.
Follow one of the two options, then go to section (5) Get the free license
Program a SD or uSD card with a full Raspbian image, already configured to run LLExec PLC runtime
The image is used to program an SD card, containing:
- the Raspbian distribution
- a modified version of the kernel that allows more accurate timing when used with PIFace I/O expansions and only on Raspberry PI models 1.
Note: if you are using Raspberry PI 2 or 3, this kernel is not needed.
- the LLExec PLC runtime
Download image
You can download the file rasppi_160323_raspbian_patched_kernel_PLC.rar from our site at url:
http://www.axelsw.it/pwiki/pub/rasppi_160707_raspbian_patched_kernel_PLC.rar
Unzip the image
Use the preferred utility to decompress the archive (eg. WinRAR)
Program an SD or uSB (at least 8 GB)
Using the preferred utility (eg. Win32DiskImager), write rasppi.img into an SD card or uSD.
Login into the system
Login as user pi, password axel
Install LLExec PLC runtime on a standard Raspbian image
With this procedure you can install the runtime Exec in a existent Raspberry PI Raspbian image. With this procedure you will have less precise timings when using PIFace I/O expansions and Raspberry PI models 1.
Download the runtime
You can download the file LLExec_2.2.2_Linux_ARM_RaspPI.tgz from our website www.axelsw.it from the Downloads section.
In the Downloads section expand the list Software -> Runtimes and please select LLexec Linux ARM RaspPI
Unzip the runtime
Use the preferred utility to decompress the archive (eg. WinRAR)
Copy the entire directory plc on Raspberry PI
Copy in the default path that is /data/plc , and make sure the file LLExec has execute permissions.
Create a standard startup script
As an example the included LLExecDaemon can be used, and hook it to the init sequence. This script will change the current directory to /data/plc and launch the file ./LLExec, with root permissions - required.
Enable SPI driver (optional)
This step is necessary only if you use a PIFace expansion card. Run the command
sudo raspi-config
Click the Advanced options Choose the A6 SPI and press Yes for the SPI interface to be enabled at startup.
Configure the network
Change the file /etc/network/interfaces in order to assign your preferred IP address.
Get the free license
- Login as user pi, password axel
and acquire root privileges with the command
sudo -s
- Stop the LLExec process, if running, with the command
/etc/init.d/LLExecDaemon stop
- Change to the directory /data/plc and issue the command
./LLExec
Send a mail to support@axelsw.it with the file HardwareID.txt of your device, generated in the directory /data/plc
Axel will send you the LLExec.key file related to your hardware.
Install the license overwriting the file in the directory /data/plc with the one sent by Axel and reboot the system,
The PLC should be started, you can now download out lates LogicLab automation suite, and connect to your target. Please follow tutorials on YouTube channel.
Installation and first use of LogicLab
Downloads of LogicLab Automation Suite
Go to our website www.axelsw.it, In the Downloads section expand the list Software -> LogicLab Automation Suite Download the file LogicLab Automation Suite
Install the setup
Launch LogicLab
Press New Project Select target Raspberry Pi 1.1 Give the project a name and press the OK button.
- From the menu On-line select Setup communication.
Select the protocol GDB, then press the Properties button.
- Change the IP address, with your Raspberry PI one and confirm.
- Choose Connect from the menu Online:
If everything went correctly, you should see the green word Connected on the status bar in the lower right corner of LogicLab
More informations
For more information you can consult the online manual, or follow our tutorials available in the news section of the website or on YouTube by following the link below:
https://www.youtube.com/user/Axelsrl
In case of throubles: save a Log File
In the case of any trouble, you can save the log file, this file can be sent to support@axel.it Steps:
- login into the Raspberry PI
- acquire root priviledges
sudo -s
- go to directory /data/plc
- launch ./AlTracePrint LLExec
- press s
- insert the preferred filename
- then press q to quit AlTracePrint
- send us the log file you saved