Re: [Emc-users] Modbus wiring

2016-04-01 Thread Danny Miller
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

Re: [Emc-users] Wheezy for Old PCs?

2016-04-01 Thread Ricardo Moscoloni
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

Re: [Emc-users] Modbus wiring

2016-04-01 Thread Gene Heskett
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,

Re: [Emc-users] Nets and parameters in *.hal files

2016-04-01 Thread andy pugh
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

Re: [Emc-users] Nets and parameters in *.hal files

2016-04-01 Thread Jeff Epler
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

Re: [Emc-users] Modbus wiring

2016-04-01 Thread Nicklas Karlsson
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

Re: [Emc-users] Modbus wiring

2016-04-01 Thread Dave Cole
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

Re: [Emc-users] Modbus wiring

2016-04-01 Thread John Thornton
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

Re: [Emc-users] Modbus wiring

2016-04-01 Thread Nicklas Karlsson
> 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

Re: [Emc-users] Modbus wiring

2016-04-01 Thread Gene Heskett
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.

Re: [Emc-users] Modbus wiring

2016-04-01 Thread Dave Cole
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

Re: [Emc-users] Modbus wiring

2016-04-01 Thread andy pugh
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

Re: [Emc-users] Modbus wiring

2016-04-01 Thread Peter Blodow
... 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

Re: [Emc-users] Modbus wiring

2016-04-01 Thread Dave Cole
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

Re: [Emc-users] Modbus wiring

2016-04-01 Thread Nicklas Karlsson
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

Re: [Emc-users] Modbus wiring

2016-04-01 Thread Stephen Dubovsky
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

Re: [Emc-users] Modbus wiring

2016-04-01 Thread Nicklas Karlsson
> > > 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

[Emc-users] Nets and parameters in *.hal files

2016-04-01 Thread Nicklas Karlsson
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

Re: [Emc-users] Modbus wiring

2016-04-01 Thread andy pugh
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

Re: [Emc-users] Modbus wiring

2016-04-01 Thread Gene Heskett
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

Re: [Emc-users] Modbus wiring

2016-04-01 Thread andy pugh
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

Re: [Emc-users] Modbus wiring

2016-04-01 Thread Dave Cole
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.

Re: [Emc-users] Modbus wiring

2016-04-01 Thread John Dammeyer
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

Re: [Emc-users] Modbus wiring

2016-04-01 Thread andy pugh
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

Re: [Emc-users] Modbus wiring

2016-04-01 Thread Gene Heskett
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

Re: [Emc-users] Modbus wiring

2016-04-01 Thread Gene Heskett
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

Re: [Emc-users] Modbus wiring

2016-04-01 Thread andy pugh
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

Re: [Emc-users] Modbus wiring

2016-04-01 Thread Erik Christiansen
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: >