Truncated 16-bit signed integers?

Hey folks,

I have an odd problem. I'm trying to set up a Delta MS300 VFD with a CMM-EC01 EtherCAT option card. I've got it working save for speed control.

It seems that the speed value sent to the VFD is lacking one of the two bytes of data:

EtherCAT PDO entry:

Debugging:

As you can see, it looks like the device has been told the speed should be instead of , as if it's missing the first byte.

Anyone have any idea how to go about fixing this? I'm not averse to diving into code but as far as I can see from the linuxcnc-ethercat code, this is just a wrapper around IgH EtherCAT's , which I assume can be trusted.

I've attached all my config files.

in normal case this should work, correct cast is done in the generic driver.

But sending 10000 means 10000rpm, if you have any limits set in the drive, the pdo will not accept the value.

in this branch is an working native driver for the ms300 with EC01.
github.com/steup-engineering/linuxcnc-et...ax5-dynamic-pdos/src


Has your Ethercat Modul worked out of the box? Them i got delivered had empty eeproms.

I'm sure it's not a limit issue. I checked the VFD thoroughly and the commanded frequency does change on the display, the display just shows it being ridiculously low. For example I command 10k RPM and the display shows something like 0.65 Hz, or I command 1000 and it shows 0.05Hz.

The native MS300 driver works perfectly though! Thanks for the reference and thanks even more for writing it in the first place!

My module mostly seemed to work out of the box but I did flash the SII with one generated from ESI with siitool in one of my earlier debugging steps.

I'am loading the sii data from file at startup with the -override-sii patch...

you can try to use float for the halpin in the ethercat_conf. but this should not be the problem.

Hi db1981 / Twour

I'm trying to set up a MS300 ethercat card (CMM-EC-02) and a have some questions you may be able to answer.If I check the pdos with "ethercat pdos" there are no SM shown at all. If i check it with "ethercat slaves" the interface shows up but it stays in Init and the error flag "E" is shown. I guess the Sii is not configured propperly? So I installed Siitool and tried to generate the sii .bin file based on the deltas .xml slave description file. I can upload it to the interface card but it still stays in the preop state. Is there something I have to change in the .xml slave description before generating the sii .bin file? I'm trying to set it up with db1981's device specific driver (thanks for that!). Do I understand it correctly, that with the device specific driver I do not need a cia402 component to link the ms300 pins to hal like Twour tried to do in his first approach? Would be interesting to see how you linked it in hal.

I would realy appreciate any help or some example files I can have a look at.

I attached a picture of the "ethercat slaves -v" output and the .xml file (It's named EC-01 even though I downloaded the one for the EC-02 card)

hi,

no cia420 is needed.
I created sii data with twincat. (try to check the with twincat or ethercat configurator and the xml from delta website, if it still gots not preop or op then hardware bug...)

on this machine delta ms300 is used:

github.com/steup-engineering/sbs625-cnc-...r/tree/master/config

there is also an working sii bin file....