Hi everyone,

I have a problem using the RPi 3 Model B as a Profinet Master in Codesys.
My system is as follows:

I have a computer running Windows 7 with CoDeSys v. 3.5 SP11 to program the PLC. The computer is connected via a switch a raspberry pi 3 Model B and a profinet device. I installed the profinet device with a GSDML-file. The device is a SCHUNK EGL90 PN.
In CoDeSys I can find the RPi3. I added an Ethernet device and below this a profinet controler (with the IP of the RPi3) and below that the profinet device.
When I log in everything seems to work but I do not get any values (see screenshots CoDeSys_1 & CoDeSys_2).

Does anyone have an idea why? Do I have to switch lowbyte and highbyte and if yes, how do I do this?

I would be very grateful to get any tip!

rKtiC

Hi,
everything seems ok,
you just need to map varibales.. then the process varibales should work.
(No mapping no processdata exchange)
BR
Edwin

Thank you for your answer Edwin.
Mapping the variables wasn't a problem but now it seems that I get values for only some of the BOOL-variables. The other ones are greyed out (screenshot ‘CoDeSys_3’).
Sometimes I got also values for other REAL-variables but then they disappeared again.
As you can see in screenshot ‘CoDeSys_4’ it looks like that port-001 of the PN-controller is not active. Could that be a reason? If yes, how can I activate it?

rKtic

Hi,
yes for me it is clear why.

BR
Edwin

or use option 2:
update always Setting.

BR
Edwin

Happy New Year!

Everything works now. The two bytes of status and control word have to be swapped.
Thanks for the help!

Well, dont know what i did wrong. When i scan for device i can see my Kuka robot and ip adress that i set on KRC, but got this error?

Hi,
which error do you mean - there is no error - next step is to select the line in this scan dialog and exceute
'Set Name + IP'.

-> then 'copy all devices to project' - and do a new download

BR
Edwin

thx Edwin, think i try that, but nothings happend? Will try again today, and post results!

BG

me again, now thats the error, but ip adress in krc is set to valid range

wow stupid mistake, i solved my issue ......connected all eth interfaces on unmenaged switch, nad everythings works at glance

Important Information for PI3B plus and current Raspbian:

If someone is using PI3B+ with Profinet Controller / Device on eth0.

There is a known issue with current Raspian and new Ethernet Driver:
the following steps are needed:

sudo apt install vlan   # VLAN-Paket installierensudo modprobe 8021q     # 8021q Kernelmodul laden

loading the kernel module could be done on restart by:
sudo su -c 'echo "8021q" >> /etc/modules'

BR
Edwin

Hello Edwin,

Is this already fixed?

Thanks
Bruno

hm.. guess not,
this need to be added to the RASBIAN Image by Rasbian.org

BR
Edwin