[etherlab-users] ETHERCAT Bus Coupler Question

[Sebastien BLANCHET]

Hi Ajith,

Kollmorgen and Beckhoff are both very reliable suppliers, but Beckhoff 
I/O ELxxx may be preferable because they are currently supported by 
LinuxCNC  http://wiki.linuxcnc.org/cgi-bin/wiki.pl?EtherCatDriver

(I do not know LinuxCNC, it is just an information I have found on their 
wiki)

Additionally, Beckhoff have exclusive innovating products what may 
interest you when moving from the pilot to the massive production
https://beckhoff.com/english.asp?ethercat/ejxxxx.htm

If your local Beckhoff contact is not seasoned yet, you may try to 
contact directly the Beckhoff headquarters in Germany and use the local 
guy only for the purchasing process.

Note: always reply to the etherlab-user mailing list, so that the mails 
are archived and may help other people.

best regards,
-- 
Sebastien BLANCHET

Le 09/01/2018 à 16:03, Ajith Boralugoda a écrit :
 > Hi! Sebastian,
 > Fyi
 > Thanks for the great clarification.!!
 > Pls see below.
 > I have a project to integrate a good reliable small CNC router for 
installing in 25,000 schools in Sri Lanka.if my current PILOT project is 
successful, I am to place volume order for parts!!!
 > I do not want to stuck with a proprietory Controller but will stick 
with LinuxCNC for Drives And Spindle, I need reliable suppliers.
 > I am almost ready to place the order and your response on the Forum 
was God send!!!
 > Attached is the quote from Kollmorgan guy in India, they are pretty 
helpful, but I have aproblem dealing with Beckhoff local guys as they 
are newly setup Agents and pretty clueless with their own product range 
even helping me to select right product Items.
 > If I can deal with any party with right Items and support I really 
don't care whether it is Kollmorgen or Beckhoff or Any other.
 > Let me know if you can help??
 > ‎
 > Regards,
 > Ajith‎

Le 09/01/2018 à 12:23, Sebastien Blanchet a écrit :
> Hi Ajith,
> 
> 1/ The Kollmorgen coupler you want to buy is a K-BUS coupler. It 
> supports many fieldbuses but is not transparent for Ethercat commands.
> So it is more difficult to use with Igh Ethercat Master than a E-BUS 
> coupler.
> 
> 2/ Kollmorgen has a very limited portfolio of I/O compared to Beckhoff, 
> so it is an uncommon choice for modular I/O.
> 
> 3/ E-BUS couplers and I/O are cheaper than K-BUS ones.
> 
> 
> That is E-BUS?
> ==============
> The physical layer of EtherCAT is based on standard Ethernet. Thus, 
> standard MII is supported for stand alone devices connected to one 
> another via CAT 5 cables. For more space and price sensitive devices 
> such as modular devices another physical layer for EtherCAT is used, the 
> so called EBUS.
> The EtherCAT protocol remains unchanged, only the physical form is changed.
> 
> Source: page 6 of EtherCAT Slave Implementation Guide
> https://www.ethercat.org/pdf/english/ETG2200_G_R_V1i1i6_ImplGuide_Slave.pdf
> 
> 
> Consequences:
> ~~~~~~~~~~~~~
> With E-BUS, the coupler is transparent for EtherCAT commands. 
> Programming and debugging is easier. For example you can list all your 
> slaves with 'ethercat slaves'
> Example on my system:
> 
> $ ethercat slaves
>   0   1:0  OP     +  EK1100 EtherCAT-Koppler (2A E-Bus)
>   1   1:1  OP     +  EL5001-0011 1K. SSI Monitor
>   2   1:2  OP     +  EL5021 1Ch. Sin/Cos Encoder
>   3   1:3  OP     +  EL5001-0011 1K. SSI Monitor
>   4   1:4  OP     +  EL1809 16K. Dig. Eingang 24V, 3ms
>   5   1:5  OP     +  EL1809 16K. Dig. Eingang 24V, 3ms
>   6   1:6  OP     +  EL1809 16K. Dig. Eingang 24V, 3ms
>   7   1:7  OP     +  EL2809 16K. Dig. Ausgang 24V, 0.5A
>   8   1:8  PREOP  +  EK1521-0010 1-Port EtherCAT-Abzweig (FX-SingleMode)
>   9  30:0  PREOP  +  EK1501-0010 EtherCAT-Koppler (2A E-Bus, 
> FX-SingleMode, ID-Switc
> 10  30:1  OP     +  EL5021 1Ch. Sin/Cos Encoder
> 11  30:2  OP     +  EL1809 16K. Dig. Eingang 24V, 3ms
> 12  30:3  OP     +  EL2809 16K. Dig. Ausgang 24V, 0.5A
> 13  30:4  PREOP  +  EK1122 2-Port EtherCAT-Abzweig
> 14  51:0  OP     +  AKD EtherCAT Drive (CoE)
> 15  52:0  OP     +  AKD EtherCAT Drive (CoE)
> 16  53:0  OP     +  AKD EtherCAT Drive (CoE)
> 17  54:0  OP     +  AKD EtherCAT Drive (CoE)
> 18  80:0  PREOP  +  EK1100 EtherCAT-Koppler (2A E-Bus)
> 19  80:1  OP     +  EL1809 16K. Dig. Eingang 24V, 3ms
> 20  80:2  OP     +  EL2809 16K. Dig. Ausgang 24V, 0.5A
> 21  80:3  OP     +  EL3104 4K. Ana. Eingang +/-10V Diff.
> 
> 
> 
> As you can see, I mix Kollmorgen AKD and Beckhoff E-BUS modular I/O 
> without problem. I need only a single domain.
> 
> best regards,