I had SERIOUS problems with my X200 VFD and RS485 bus- I "mostly" fixed it.
Here's the thing- yes, RS485 is differential, but the VFD is probably
NOT opto-isolated input. Differential conveys strong noise immunity-
but ONLY when both A and B wires' voltages are within the input range of
the VF
one thing to note (as already i witness it), is that wheezy as light is on
memory resources (100mb or so for running), something screw latency in old
pc's when ubuntu 10.04lts is not.
old pcs are:
p4 on an asrock 775i65G mb
amd athlon64 not remember mb
regards
rck
2016-03-31 15:34 GMT-03:00 Gen
On Friday 01 April 2016 17:17:16 John Thornton wrote:
> You're going to turn copper to steel?
>
Puzzled me too John, until I remembered the date. Today I don't believe
a thing I read, and only about 5% of what I see.
> On 4/1/2016 3:57 PM, Nicklas Karlsson wrote:
> >> On 1 April 2016 at 20:07,
On 1 April 2016 at 23:51, Jeff Epler wrote:
> This is not really feasible in the general case anyway. What pins does
> "hm2_eth.so" create? This depends on the connected hardware, and even
> the initial prefix of the pins/parameters is not known until the
> attached hardware is probed.
Ditto a
No, there is no way to take a component and find out the pins
and parameters it will create, except for loading it and looking at the
lists halcmd can print.
This is not really feasible in the general case anyway. What pins does
"hm2_eth.so" create? This depends on the connected hardware, and ev
I can turn gold to lead, do you want see. It should have been that kind of
steal.
> You're going to turn copper to steel?
>
> On 4/1/2016 3:57 PM, Nicklas Karlsson wrote:
> >> On 1 April 2016 at 20:07, Dave Cole wrote:
> >>> Profibus is basically an RS485 network as well.I have no idea why
On 4/1/2016 1:48 PM, andy pugh wrote:
> On 1 April 2016 at 20:07, Dave Cole wrote:
>> Profibus is basically an RS485 network as well.I have no idea why
>> they used a purple jacket color.
> There is an awful lot of purple wiring on the London Underground.
> Perhaps that is data cable.
Siemens
You're going to turn copper to steel?
On 4/1/2016 3:57 PM, Nicklas Karlsson wrote:
>> On 1 April 2016 at 20:07, Dave Cole wrote:
>>> Profibus is basically an RS485 network as well.I have no idea why
>>> they used a purple jacket color.
>> There is an awful lot of purple wiring on the London U
> On 1 April 2016 at 20:07, Dave Cole wrote:
> > Profibus is basically an RS485 network as well.I have no idea why
> > they used a purple jacket color.
>
> There is an awful lot of purple wiring on the London Underground.
> Perhaps that is data cable.
What do you plan to do with it? Steel it
On Friday 01 April 2016 13:58:55 Stephen Dubovsky wrote:
> You can not include the termination or pull up/down resistors on a
> RS422/485 network in the drivers (unless they can by disabled.) You
> don't know where (or how many) are located on the bus. They are
> multi-drop networks after all.
Well that is true. It does tend to stand out from the generic gray
control cabling.
Dave
On 4/1/2016 1:26 PM, Peter Blodow wrote:
> ... because this will be different from all other kinds of cables.
> Imagine large facilities, dozens of buildings, with thousands of devices
> being controlled b
On 1 April 2016 at 20:07, Dave Cole wrote:
> Profibus is basically an RS485 network as well.I have no idea why
> they used a purple jacket color.
There is an awful lot of purple wiring on the London Underground.
Perhaps that is data cable.
--
atp
"A motorcycle is a bicycle with a pandemoniu
... because this will be different from all other kinds of cables.
Imagine large facilities, dozens of buildings, with thousands of devices
being controlled by a central control room, wired by random cable
colours. These are being mixed with current supply, LAN, telephone and
all other cables t
On 4/1/2016 11:55 AM, andy pugh wrote:
> On 1 April 2016 at 18:33, Dave Cole wrote:
>> Unless you are running at 60+ Kbaud and up and long distances you likely
>> won't need anything but twisted pair cabling.
> It was mainly the purple thing.
Ha ha...
Well, I must like purple also.I have the
Yes termination with pull up/down in both ends.
On Fri, 1 Apr 2016 13:58:55 -0400
Stephen Dubovsky wrote:
> You can not include the termination or pull up/down resistors on a
> RS422/485 network in the drivers (unless they can by disabled.) You don't
> know where (or how many) are located on t
You can not include the termination or pull up/down resistors on a
RS422/485 network in the drivers (unless they can by disabled.) You don't
know where (or how many) are located on the bus. They are multi-drop
networks after all. Only terminate the two far ends.
On Fri, Apr 1, 2016 at 1:37 PM,
> > > Twisted pair is a transmission line and subject to all the vagaries
> > > of load matching and such.
> > >
> > > That cables impedance is not listed there,
> >
> > Yes it is. 120 Ohms.
>
> Resistance is NOT impedance, Andy. And I first read that as 1200 because
> my screen is high res and
I have read thru the source. Are there any method to find out from source name
of block connection points used to set parameters with "setp" and connect
signals with "net" in *.hal files?
I have seen they are documented in manual but machine readable from source
would be good.
Regards Nicklas
On 1 April 2016 at 16:58, John Dammeyer wrote:
> Which cable is the Van Damme?
> Can you post an ebay # or link?
http://www.ebay.co.uk/itm/141838984494
--
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lun
On Friday 01 April 2016 11:33:18 andy pugh wrote:
> On 1 April 2016 at 16:22, Gene Heskett wrote:
> >> http://www.rapidonline.com/cables-connectors/belden-9841-data-cable
> >>-for-rs-485-51-6887
> >
> > Twisted pair is a transmission line and subject to all the vagaries
> > of load matching and s
On 1 April 2016 at 18:33, Dave Cole wrote:
> Unless you are running at 60+ Kbaud and up and long distances you likely
> won't need anything but twisted pair cabling.
It was mainly the purple thing.
--
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial
On 4/1/2016 10:33 AM, andy pugh wrote:
> On 1 April 2016 at 16:22, Gene Heskett wrote:
>>> http://www.rapidonline.com/cables-connectors/belden-9841-data-cable-for-rs-485-51-6887
>> Twisted pair is a transmission line and subject to all the vagaries of
>> load matching and such.
>>
>> That cables i
Which cable is the Van Damme?
Can you post an ebay # or link?
Thanks
John
> -Original Message-
> From: andy pugh [mailto:bodge...@gmail.com]
> Sent: April-01-16 8:33 AM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Modbus wiring
>
> On 1 April 2016 at 16:22, Gene He
On 1 April 2016 at 16:22, Gene Heskett wrote:
>> http://www.rapidonline.com/cables-connectors/belden-9841-data-cable-for-rs-485-51-6887
>
> Twisted pair is a transmission line and subject to all the vagaries of
> load matching and such.
>
> That cables impedance is not listed there,
Yes it is. 12
On Friday 01 April 2016 07:02:14 andy pugh wrote:
> On 1 April 2016 at 11:46, Erik Christiansen
wrote:
> > Incidentally, is that cable in the last picture twisted pair?
> > Shielded or no, is its characteristic impedance controlled?
>
> It is just what I cold find in Maplin that evening.
> I wil
On Friday 01 April 2016 06:46:02 Erik Christiansen wrote:
> On 30.03.16 17:13, andy pugh wrote:
> > In the end, I fitted a different VFD which has a pre-written HAL
> > driver. It also only has two connections for RS485, so is less
> > confusing. I found a way to connect the dongle to the motherbo
On 1 April 2016 at 11:46, Erik Christiansen wrote:
>
> Incidentally, is that cable in the last picture twisted pair? Shielded
> or no, is its characteristic impedance controlled?
It is just what I cold find in Maplin that evening.
I will see how well it works, and if there is a problem I can buy
On 30.03.16 17:13, andy pugh wrote:
> In the end, I fitted a different VFD which has a pre-written HAL driver.
> It also only has two connections for RS485, so is less confusing.
> I found a way to connect the dongle to the motherboard header:
> https://forum.linuxcnc.org/forum/18-computer/30675-on
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