I’m experimenting with RPi2 and openPOWERLINK and after having an issue and posting on the openPOWERLINK discussion forum, the openPOWERLINK team replied suggesting that I try to increase the cycle time and poll response time using openCONFIGURATOR. So I downloaded the openCONFIGURATOR Windows build from their SourceForge site. But I wasn’t able to use it, my AVG Anti Virus found a virus in it. Probably a false positive but that stimulated me to get the source code and compile it on my Windows 7.
Anyway I ended up installing just the Eclipse (Mars 4.5.1) openCONFIGURATOR plugin that comes with a pre-compiled library, so in fact I didn’t need to compile it, but I leave here the necessary information, in case someone needs it.
Continue reading “Build openCONFIGURATOR on Windows 7”
I was working with another programmer in the same Automation Studio project that was shared using SVN, and after a new SVN checkout I had this compiler error message:
Error : undefined reference to `FileOpen’
So it looked like someone started using some file handling library, looking around the documentation I realize that it is the FileIO library. The undefined reference means the corresponding binary file was not found by the compiler…
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I recently used a hardware configuration where a B&R X20CP1381 CPU was controlling a couple of async motors using the ACOPOSmicro and a stepper motor using the X20SM1436. I needed a task running at 4ms but the current configuration was set to 10ms. When you add an ACOPOS controller, the CPU system timer configuration changes automatically to EPL/X2X Interface and the POWERLINK interface is selected, in my case it is the IF3 interface. The POWERLINK cycle time is 10ms by default in a new project.
So, in order to change my tasks cycle time, I have to change the POWERLINK cycle time to 4ms, which allows me to set the #1 Task classes timing to 4ms.
All looked fine, I tested the async motors and they were working, but when I tested the stepper motor I had an error, don’t remember its code but it was something related to timing. I opened the X2X (IF6) bus configuration and changed its cycle time also to 4ms. This fixed the problem! I think the reason is that the ncsdcctrl program is in the cyclic #1 tasks group running at 4ms and the X2X bus was running slower. I guess that if I had placed the ncsdcctrl program in a 10ms task it would also fix the issue, as the X2X cycle time is 10ms by default. Ho well, 10 is not a multiple of 4 so I can’t have a 10ms task, that fix wouldn’t work ;-) So probably the only possible solution is to have the POWERLINK, the X2X bus and the ncsdcctrl program all running at 4ms.
I’ve been using B&R Automation Studio 3.0.90 for a few years, but as all IT tools there is always a time when you have to upgrade to the newest version of the software… Well, programmers have to make a living right? Humm… lets not enter into this upgrading subject… :-D
So, as I was saying, I need to start using the new AS 4.1 because some of the new hardware components no longer work with AS 3.0.90 as is the case of the new ACOPOSmulti passive power supply 8B0P0110HW00.000-1.
There are lots of improvements in AS 4.1 but the global feeling is about the same, no steep learning curve ahead to be able to use this new version. That’s a relief.
Continue reading “From B&R Automation Studio 3.0.90 to Automation Studio 4.1”