>
> > Does it actually report itself as an FTDI device as per the writeup (and
> > photo with 6 wires)?
>
> Yes, 0x0403 : 6001
>
Thanks
John
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On Tue, 11 Aug 2020 at 17:44, John Dammeyer wrote:
> Does it actually report itself as an FTDI device as per the writeup (and
> photo with 6 wires)?
Yes, 0x0403 : 6001
--
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses,
> -Original Message-
> From: andy pugh [mailto:bodge...@gmail.com]
> Sent: August-11-20 6:56 AM
> To: Enhanced Machine Controller (EMC)
> Subject: [Emc-users] Modbus cable for HY VFD
>
> I have just got my HY VFD working with one of these:
>
> https://
I have just got my HY VFD working with one of these:
https://www.amazon.co.uk/gp/product/B075818Z6H
Probably a neater solution than the ones without an integrated cable.
But note that the picture shows 6 wires and in fact there are only 4
on the item that arrived.
Still, the cable appears to be
On 06.02.20 12:01, Kirk Wallace wrote:
> I am currently building an off-grid solar generation and storage system
> which have controllers using Modbus, so I may be active with Modbus again
> soon. If so, I will try to address your issues below and add any new
> information to the LinuxCNC wiki as I
On Monday 04 April 2016 09:37:08 Nicklas Karlsson wrote:
> > Maybe. OTOH, I can probably knock up something in eagle or geda/pcb,
> > and carve it on my machine by the time UPS could make a drop here.
> > Those pictured boards Farnell shows me are quite simple, and adding
> > another thru-hole fo
> Maybe. OTOH, I can probably knock up something in eagle or geda/pcb, and
> carve it on my machine by the time UPS could make a drop here. Those
> pictured boards Farnell shows me are quite simple, and adding another
> thru-hole for the supply bypassing those chips ought to have would be
> ea
On Monday 04 April 2016 01:52:42 Nicklas Karlsson wrote:
> > > > > ISO7421
> > > >
> > > > Now thats sweet, and a heck of a lot better thought out than the
> > > > last such chip I looked at a decade ago. Needs a 4 wire cable
> > > > from each direction, but I don't see as that as a problem other
Lemme clarify- whether or not you're galvanically isolating, any RS485
transceiver needs either 3-wire or 4-wire logic due to its half-duplex
nature, OR to be protocol-aware.
I don't know if the RTS could be used that way. RTS is hardware flow
control, which is obsolete now and often not imple
> That's a bare unidirectional isolator. OK for RS232. Problem being,
> Modbus is over RS422/RS485, a bidirectional protocol and there's a lot
> of difficult problems in creating buffers of any sort. It doesn't know
> which direction it's supposed to drive at any given time.
>
> http://www.mo
That's a bare unidirectional isolator. OK for RS232. Problem being,
Modbus is over RS422/RS485, a bidirectional protocol and there's a lot
of difficult problems in creating buffers of any sort. It doesn't know
which direction it's supposed to drive at any given time.
http://www.mouser.com/Sea
> > > > ISO7421
> > >
> > > Now thats sweet, and a heck of a lot better thought out than the
> > > last such chip I looked at a decade ago. Needs a 4 wire cable from
> > > each direction, but I don't see as that as a problem other than
> > > stealing the ground and 3.3 or 5 volts to run its side
On Sunday 03 April 2016 18:12:28 Nicklas Karlsson wrote:
> > > ISO7421
> >
> > Now thats sweet, and a heck of a lot better thought out than the
> > last such chip I looked at a decade ago. Needs a 4 wire cable from
> > each direction, but I don't see as that as a problem other than
> > stealing t
> > ISO7421
>
> Now thats sweet, and a heck of a lot better thought out than the last
> such chip I looked at a decade ago. Needs a 4 wire cable from each
> direction, but I don't see as that as a problem other than stealing the
> ground and 3.3 or 5 volts to run its side of it at both ends.
On Sunday 03 April 2016 15:07:59 Nicklas Karlsson wrote:
> ISO7421
Now thats sweet, and a heck of a lot better thought out than the last
such chip I looked at a decade ago. Needs a 4 wire cable from each
direction, but I don't see as that as a problem other than stealing the
ground and 3.3 o
ISO7421 is two channel bidirectional, there are more of them with different
configurations.
On Sun, 3 Apr 2016 14:30:50 -0400
Gene Heskett wrote:
> On Sunday 03 April 2016 14:10:04 Nicklas Karlsson wrote:
>
> > I tried opto isolators and they did not work without errors while
> > capacitive i
On Sunday 03 April 2016 14:10:04 Nicklas Karlsson wrote:
> I tried opto isolators and they did not work without errors while
> capacitive insulation barriers did. It was a suprise and I can't tell
> why. I think most devices including opto have a limited dv/dt
> tolerance.
Damn, old wet ram strik
On Sunday 03 April 2016 13:36:23 Danny Miller wrote:
> Well, if you have 2 differential wires with a simple optoisolator at
> the far end, ground noise/ground loops would have no effect
> whatsoever. You don't need a ground. There would be no place to put a
> ground. There are no common-mode iss
I tried opto isolators and they did not work without errors while capacitive
insulation barriers did. It was a suprise and I can't tell why. I think most
devices including opto have a limited dv/dt tolerance.
On Sun, 3 Apr 2016 12:36:23 -0500
Danny Miller wrote:
> Well, if you have 2 differe
On Sunday 03 April 2016 09:35:04 Nicklas Karlsson wrote:
[huge snip]
> You could also read if there is something in the manual about a
> shielded cable and how it should be connected.
>
>
> Nicklas Karlsson
Such information is not mentioned in my Chinglish manual. And thats
troublesome too IMO
Well, if you have 2 differential wires with a simple optoisolator at the
far end, ground noise/ground loops would have no effect whatsoever. You
don't need a ground. There would be no place to put a ground. There are
no common-mode issues. The slave device's ground could be +300VDC above
the
> > Gene Heskett wrote:
> > > On Saturday 02 April 2016 07:04:14 Nicklas Karlsson wrote:
> > > > > 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-isol
On Sunday 03 April 2016 06:21:38 Nicklas Karlsson wrote:
> On Sat, 2 Apr 2016 11:34:25 -0400
>
> Gene Heskett wrote:
> > On Saturday 02 April 2016 07:04:14 Nicklas Karlsson wrote:
> > > > I had SERIOUS problems with my X200 VFD and RS485 bus- I
> > > > "mostly" fixed it.
> > > >
> > > > Here's th
On Sat, 2 Apr 2016 11:34:25 -0400
Gene Heskett wrote:
> On Saturday 02 April 2016 07:04:14 Nicklas Karlsson wrote:
>
> > > 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
On Saturday 02 April 2016 07:04:14 Nicklas Karlsson wrote:
> > 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-
> 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
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
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,
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
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 Apri
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
On 9 February 2016 at 11:23, andy pugh wrote:
> This is where things get iffy. Imagine that I have the 2-terminal
> dongle plugged into a laptop. What do I use for a gnd? Stuff a wire
> down the side of the USB connector? trap the wire in the hinge? :-)
In the end, I fitted a different VFD which
On 09.02.16 11:23, andy pugh wrote:
> On 9 February 2016 at 09:10, Erik Christiansen
> wrote:
> > The two-terminal dongle would be used for half-duplex, with separate
> > grounds, relying on less than 7v float.
>
> This is where things get iffy. Imagine that I have the 2-terminal
> dongle plugge
On 08/02/16 13:16, andy pugh wrote:
> Is that ever going to work? The YSB dongle seems deficient in
> terminals by at least 1, possibly 4...
The quick answer here is YES the dongle is deficient in that it should
provide at least a screen connection rather than just data. The adapter
I use with the
On 9 February 2016 at 09:10, Erik Christiansen wrote:
> The two-terminal dongle would be used for half-duplex, with separate
> grounds, relying on less than 7v float.
This is where things get iffy. Imagine that I have the 2-terminal
dongle plugged into a laptop. What do I use for a gnd? Stuff a w
On 9 February 2016 at 09:10, Erik Christiansen wrote:
> What about 20 mA current loop? Sending an analogue signal as a current,
> rather than a voltage is reputed to be significantly more noise immune
> than sending it as a voltage.
I have a 7i49 with 6 channels of +/- 10V for servo drives that I
On 08.02.16 13:16, andy pugh wrote:
> I need to connect to 8P8C connector on the VFD which has pins
> 1 A'
> 2 B'
> 3 A'
> 4 R
> 5 D
> 6 B'
> 7 DP5V
> 8 SG(GND)
>
> Is that ever going to work? The YSB dongle seems deficient in
> terminals by at least 1, possibly 4...
The above looks a lot like fu
On 09/02/16 05:20, Kirk Wallace wrote:
> (Bottom of page here:
> http://wiki.linuxcnc.org/cgi-bin/wiki.pl?AVR
> has it been five years already?)
Sounds about right ... must get some of these longer term projects
finished ;) That includes a nice modbus module for additional inputs and
control ...
--
From: "andy pugh"
To: "Enhanced Machine Controller (EMC)"
Sent: Monday, February 8, 2016 7:22:17 PM
Subject: Re: [Emc-users] Modbus wiring
On 8 February 2016 at 23:10, Bertho Stultiens wrote:
> I'd start with writing the manufacturer for the right docs.
I tri
On 02/08/2016 12:54 PM, andy pugh wrote:
> On 8 February 2016 at 20:34, Bertho Stultiens wrote:
>> But, I should not hijack the thread with information theory...
>
> In theory Modbus should be better, but I don't have any information
> about the VFD interface.
>
> That's the version of information
On 2/8/2016 3:54 PM, andy pugh wrote:
> On 8 February 2016 at 20:34, Bertho Stultiens wrote:
>> But, I should not hijack the thread with information theory...
> In theory Modbus should be better, but I don't have any information
> about the VFD interface.
>
> That's the version of information theo
On 8 February 2016 at 23:10, Bertho Stultiens wrote:
> I'd start with writing the manufacturer for the right docs.
I tried.
http://www.lovatoelectric.co.uk/Information-request/cnt
Appears to have a "Send" button that doesn't do anything.
--
atp
If you can't fix it, you don't own it.
http://www.
On 8 February 2016 at 23:10, Bertho Stultiens wrote:
>> I thought of that, but they only document writable parameters. None of
>> them look like a likely place to read currents or voltages.
>
> Often you have r/w registers, where you read a measured value and write
> a parameter. However, you are
On 2/8/2016 1:03 PM, Bertho Stultiens wrote:
> Telephony has been digitalized completely today. Television has
> transitioned from analog to digital, freeing more than 50% of the
> bandwidth, while increasing the number of channels. Radio will follow
> (currently running parallel).
There have bee
Andy,
This isn't the worst thing I've seen. Rs485 is a two wire differential half
duplex signalling system. The doc says that it can run up to 38.4kbps.
So you one 1 wire to the plus of the master and the vfd and the other wire
to the minus. It will run on anything twisted that is better than tin
On 02/08/2016 11:56 PM, andy pugh wrote:
>> My best guess is that they have mapped the entire register space from
>> the front-panel config (page 4-9 and forward), as documented, to the
>> communications register map. That should be possible to test with a few
>> read commands.
>
> I thought of th
On 8 February 2016 at 22:20, Bertho Stultiens wrote:
> My best guess is that they have mapped the entire register space from
> the front-panel config (page 4-9 and forward), as documented, to the
> communications register map. That should be possible to test with a few
> read commands.
I thought
On 02/08/2016 11:03 PM, andy pugh wrote:
>> Try and try again, or get a hold of the documentation. ;-)
>
> The documentation is silent on the subject:
> http://www.lovatoelectric.com/Single-phase-supply-200-240VAC-50-60Hz-EMC-suppressor-built-in-PNP-24VDC-programmable-inputs/150005010/spd
Interes
On 8 February 2016 at 21:42, Bertho Stultiens wrote:
> Try and try again, or get a hold of the documentation. ;-)
The documentation is silent on the subject:
http://www.lovatoelectric.com/Single-phase-supply-200-240VAC-50-60Hz-EMC-suppressor-built-in-PNP-24VDC-programmable-inputs/150005010/spd
On 02/08/2016 10:12 PM, andy pugh wrote:
>> I thought that ModBus was pretty standardized:
> So which register do I write to to set output frequency?
Do you have the original documentation of the VFD? I guess not.
Do you have any "old" VFD control or test software, If you have, you can
reverse eng
On 8 February 2016 at 21:04, Bertho Stultiens wrote:
> I thought that ModBus was pretty standardized:
So which register do I write to to set output frequency?
Which register do I read to monitor motor current?
(And, back to the original question, how do I wire the 8 pins on the
VFD to the 2 pi
On 02/08/2016 09:54 PM, andy pugh wrote:
> On 8 February 2016 at 20:34, Bertho Stultiens wrote:
>> But, I should not hijack the thread with information theory...
> In theory Modbus should be better, but I don't have any information
> about the VFD interface.
>
> That's the version of information
On 8 February 2016 at 20:34, Bertho Stultiens wrote:
> But, I should not hijack the thread with information theory...
In theory Modbus should be better, but I don't have any information
about the VFD interface.
That's the version of information theory that matters to me here.
--
atp
If you can
On 02/08/2016 09:12 PM, Peter C. Wallace wrote:
>> The number of bits required goes to the root of Shannon's information
>> theory. We see how effective it is in our daily life everywhere and it
>> is better than analog.
>>
>> Telephony has been digitalized completely today. Television has
>> trans
> On 02/08/2016 08:52 PM, Nicklas Karlsson wrote:
> >> Noise in analog will reduce the effective resolution, whereas noise in
> >> digital can be easily filtered and the resolution stays constant.
> >> Analog signals cannot be isolated easily and trying so results in
> >> awkward non-linearities th
On 02/08/2016 09:01 PM, Nicklas Karlsson wrote:
>> I agree with the sentiment that it is less than ideal to have something
>> that certainly has a local microprocessor that then creates an analog out
>> which you then read in. It's a lossy channel and subject to any number of
>> problems. That assu
On Mon, 8 Feb 2016, Bertho Stultiens wrote:
> Date: Mon, 8 Feb 2016 21:03:44 +0100
> From: Bertho Stultiens
> Reply-To: "Enhanced Machine Controller (EMC)"
>
> To: "Enhanced Machine Controller (EMC)"
> Subject: Re: [Emc-users] Modbus wiring
>
&
On 02/08/2016 08:23 PM, Jerry Scharf wrote:
> I agree with the sentiment that it is less than ideal to have something
> that certainly has a local microprocessor that then creates an analog out
> which you then read in. It's a lossy channel and subject to any number of
> problems. That assumes you
On 02/08/2016 08:52 PM, Nicklas Karlsson wrote:
>> Noise in analog will reduce the effective resolution, whereas noise in
>> digital can be easily filtered and the resolution stays constant.
>> Analog signals cannot be isolated easily and trying so results in
>> awkward non-linearities that need to
On Mon, 8 Feb 2016 11:23:23 -0800
Jerry Scharf wrote:
> Bertho,
>
> I agree with the sentiment that it is less than ideal to have something
> that certainly has a local microprocessor that then creates an analog out
> which you then read in. It's a lossy channel and subject to any number of
> pr
> On 02/08/2016 07:01 PM, Dave Cole wrote:
> >>> RS485 is two wire, half duplex.
> >>> I think you have a RS422 connection that can run full duplex.
> >>> I don't recognize the D and R pins??Perhaps Data Ready and Request
> >>> to Send ??
> >>> Those aren't normally required for RS422.
> >> I a
Bertho,
I agree with the sentiment that it is less than ideal to have something
that certainly has a local microprocessor that then creates an analog out
which you then read in. It's a lossy channel and subject to any number of
problems. That assumes you have the software skills and documentation
On 02/08/2016 07:01 PM, Dave Cole wrote:
>>> RS485 is two wire, half duplex.
>>> I think you have a RS422 connection that can run full duplex.
>>> I don't recognize the D and R pins??Perhaps Data Ready and Request
>>> to Send ??
>>> Those aren't normally required for RS422.
>> I am becoming inc
> On 8 February 2016 at 17:40, Dave Cole wrote:
> > RS485 is two wire, half duplex.
> > I think you have a RS422 connection that can run full duplex.
> > I don't recognize the D and R pins??Perhaps Data Ready and Request
> > to Send ??
> > Those aren't normally required for RS422.
>
> I am be
On 2/8/2016 12:51 PM, andy pugh wrote:
> On 8 February 2016 at 17:40, Dave Cole wrote:
>> RS485 is two wire, half duplex.
>> I think you have a RS422 connection that can run full duplex.
>> I don't recognize the D and R pins??Perhaps Data Ready and Request
>> to Send ??
>> Those aren't normall
On 8 February 2016 at 17:40, Dave Cole wrote:
> RS485 is two wire, half duplex.
> I think you have a RS422 connection that can run full duplex.
> I don't recognize the D and R pins??Perhaps Data Ready and Request
> to Send ??
> Those aren't normally required for RS422.
I am becoming increasin
RS485 is two wire, half duplex.
I think you have a RS422 connection that can run full duplex.
I don't recognize the D and R pins??Perhaps Data Ready and Request
to Send ??
Those aren't normally required for RS422.
Dave
On 2/8/2016 8:16 AM, andy pugh wrote:
> I am tempted to attempt to contro
yea it's a bit short on pins
i use these
http://www.ebay.co.uk/itm/Useful-80mm-USB-2-0-to-RS-485-RS-422-Serial-Converter-Adapter-Cable-ST-/151912461839
On 8 February 2016 at 13:16, andy pugh wrote:
> I am tempted to attempt to control the lathe VFD with Modbus.
>
> I have one of these:
>
> ht
I am tempted to attempt to control the lathe VFD with Modbus.
I have one of these:
http://www.ebay.com/itm/CH340-USB-to-RS485-485-Converter-Adapter-Module-For-Win7-Linux-XP-Vista-/201258967189?hash=item2edbf82095:g:SDAAAOSw2s1UrPYd
I need to connect to 8P8C connector on the VFD which has pins
1 A
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I have a gang router running Linuxcnc and controlling 8 VFDs through one
USB-RS485 and the generic Mb2hal driver.
- Original Message -
From: "alex chiosso"
To: "Enhanced Machine Controller (EMC)"
Sent: Wednesday, April 1, 2015 5:11:21 PM
Subject: Re: [Emc-
On 1 April 2015 at 17:26, Mark Johnsen wrote:
> PS - what reader do you use for this mailing list to get the ">" inserted?
> I simply have been using gmail and recall posts a long time ago on better
> readers, but I couldn't find it when I searched?
Click in the message you want to reply to so t
Seb,
I had that graphic taped up on the wall at my last job:-) Never did use
it, but thought it was cool.
Anyway, after looking at it again, none of the standard I/O outside of
limits and motor control is real-time, so I guess it doesn't matter...
Thanks,
Mark
On 4/1/15 3:11 PM, alex chiosso wrote:
> I do believe that you can use LCNC with a usb to RS485 converter and the
> Modbus protocol by ClassicLadder softplc built into LCNC or the mb2hal
> component.
I agree.
We also have drivers for a couple of VFDs that use modbus:
http://linuxcnc.org/docs/2.7
I do believe that you can use LCNC with a usb to RS485 converter and the
Modbus protocol by ClassicLadder softplc built into LCNC or the mb2hal
component.
Alex
Il giorno 01/apr/2015 23:04, "Mark Johnsen" ha scritto:
> Alex,
>
> Yes, the application is industrial grade, but it is quite simple (2
On 4/1/15 3:03 PM, Mark Johnsen wrote:
> SEB - I can embrace USB. I just thought that was looked down upon due to
> the lack of real-time nature of USB ports? Although, I don't really need
> real-time here for temp control. Just updating and current temp feedback.
It is true that USB is not re
Alex,
Yes, the application is industrial grade, but it is quite simple (2 axes of
motion). I only need 1 modbus network to two temp controllers. Since
there are 2, that rules out '1' RS-232 network, but I can use '1' RS-485
network. Or Seb's USB setup would work.
I did see on the mesa site the
Hi Mark .
Be careful with this kind of adapters because they are not optocoupled .
If your application is an industrial grade I will spend some more money and
buy something like the Advantech converter/adapter you linked above.
Do you really need to have two separate Modbus network ?
Alex
On Wed,
- Original Message -
> From: "Mark Johnsen"
> To: "Enhanced Machine Controller"
> Sent: Wednesday, April 1, 2015 12:05:54 PM
> Subject: [Emc-users] Modbus RS-485 Connection with Mesa?
> I'm looking at controlling a X-Z gantry system w/ LinuxCNC (wel
On 4/1/15 10:26 AM, Mark Johnsen wrote:
> The love controller has a -995 option, which is RS232. But, there are 2
> controllers and there's no addressing for the rs-232 version from what I
> saw. I thought maybe you could daisy chain them, but seems you can only
> address the RS-485 version.
Rig
Seb - How do you respond so fast?!
The love controller has a -995 option, which is RS232. But, there are 2
controllers and there's no addressing for the rs-232 version from what I
saw. I thought maybe you could daisy chain them, but seems you can only
address the RS-485 version.
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