Pete.
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Yes it's in Standard mode. Here's aa link to t quick reference, it doesn't give all the parmeters but a lot of them.
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daleyd
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One thing to check would be that it's not running into current limit - that will limit the frequency. (Unlikely if just on bench but I had it with an odd American motor I have here, runs like a dog and needs to be auto tuned then it will run fine - thats on a siemens drive)
Do you have a meter with frequency measurement to see what it's putting out?
The parameter for motor speed is NSP (Nominal motor speed)
Do you have a meter with frequency measurement to see what it's putting out?
The parameter for motor speed is NSP (Nominal motor speed)
daleyd
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Sounds really odd Pete - exactly half speed suggests something parameter wise but struggling to see what it might be! May of course just be faulty…
I think NSP parameter is only used for indication but worth trying it at nameplate value. Also an auto tune may help, but again I can’t see it helping but you never know!
Pete.
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Right mystery solved, as expected it was a RTFM failure. The 50 was not a 50Hz but 50% of AiUi virtual reference frequency (percent of range from 10hz minimum to 50hz maximum range).
I figured this out after turning the dial down so the value was zero but the motor kept turning.
I figured this out after turning the dial down so the value was zero but the motor kept turning.
daleyd
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Ha ha well spotted!
Pete.
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Just a matter of being unfamiliar with the config. Thanks for the help.
BTW the FDTI thing is gone I must have thrown it out in a clear-up. I got it back around 2007 for reading/flashing ECU firmware to my turbo bike. I'll keep an eye out for a programming cable or converter because it looks like that software would make things a lot easier.
Another thing - I did put the parameters in for the 1.1kw motor then ran auto-tune but now the motor rattles and jumps about on the bench at about 25hz. It's fine low down and at rated speed it's just over a band of about 8-10hz it gets very rough.
Pete.
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Yep I found that too
Trouble is when you're using the dial to vary the speed it's several key presses away to view it and then several more to get back to frequency adjustment. It would be great for external control though.
daleyd
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I use a cheap (about £5) usb - rs485 converter I picked up from Amazon, it works great. I should get a proper one from work really it’s just that this works - I use it for other stuff (pid controllers, Siemens drives, HMIs - all sorts…) as well so i don’t have to keep a dedicated cable just for these drives.
I’ll chuck up a pic of the unit and cable connections. (It just uses 2 cores of an rj45 cable, the end with the plug connects into the rj45 socket on the drive)
daleyd
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you can reset the auto tune, most of the time it helps but it can highlight other problems. Sometimes it’s better that it just runs as a “dumb” drive rather than anything fancy.
On my omnimill the vertical head won’t run at all nicely at low speed in vector mode despite everything being ok and it supposedly being *better*. Stick it in bog standard v/f mode and it runs like a dream
I would spend more time looking into it but it works as is so there’s no point really.
On my omnimill the vertical head won’t run at all nicely at low speed in vector mode despite everything being ok and it supposedly being *better*. Stick it in bog standard v/f mode and it runs like a dream
I would spend more time looking into it but it works as is so there’s no point really.
Pete.
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I reset the drive again with no effect, then set the controls to external and wired in a fwd switch and speed pot. Now the rough running is gone on my test motor plus I can watch the frequency ref. It also works on my re-wired TOS motor but it's a bit whistly I think it might be simply because the motor is over-sized.
I'm getting to like these altivar drives could you send me that lik to the interface chip please and I'll make up a programming cable.
I'm getting to like these altivar drives could you send me that lik to the interface chip please and I'll make up a programming cable.
daleyd
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Yes will do mate, it’s under a pile of junk in my office at moment but I’ll dig it out tomorrow
Hood
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This is one I have used which works well with the Telemecanique (Schneider) Lexium drives, bit more expensive than the cheap ones from China but it works well and a few of the Chinese ones I tried first didn't work or didn't last.
KMTronic USB to RS485 FTDI Interface Converter BOX | eBay
KMtronic LTD. FTDI Interface Converter. FTDI FT232RL Chip. USB to RS485. This auto transmit converter, features bi-directional serial conversion from USB to RS485 in 2 wire half duplex mode using Virtual Serial COM Port.
www.ebay.co.uk
Pete.
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It's a Schneider Altivar, so decent enough. You can program it on theunit but the software looks a lot handier plus you get a screen full of info at once rather than the drive's display.
TBH I don't know why they can't put a phone screen interface on them, can't be too difficult.
