[etherlab-users] Using EK1100 & EL2008 with DC

[Ralf Roesch]

Oguz,

if you have a look at the Beckhoff site you will find the EL2008 
technical data table:

--
Technical data    EL2808
Connection technology    2-wire
Number of outputs    8
Rated load voltage    24 V DC (-15 %/+20 %)
Load type    ohmic, inductive, lamp load
Distributed clocks    –
Max. output current    0.5 A (short-circuit-proof) per channel
Short circuit current    typ. < 2 A
...
--

The distributed clocks is not available regarding the table.

My estimation is:
the module itself might have a DC capable EtherCAT slave controller 
(ESC) which is detected by the EtherLab Master
but the module does not support the logic (hard, soft) for DC operation.

Regarding AssignActivate:
you should use it for modules where DC is required and hardware I/O is 
synchronized to the EtherCAT real time bus cycle.
The EK1100 bus coupler  has no I/O and thus no need for an 
AssignActivate setup.
It only has the function (besides module extension) as a reference clock 
slave in your setup because it is the first detected DC capable slave 
device.

I think you have to look for an other output module.

regards and iye aksamlar
Ralf

On Tue Jul 03 2012 18:14:09 GMT+0200, Oguz Dilmac 
<odilmac at bilko.com.tr>  wrote:
> Hi Ralf,
>
> I checked again with etherlab master. It looks my devices support it.
>
> Then I checked from Beckoff site: I downloaded "EL20xx_EL2124en.chm" 
> from, http://www.beckhoff.com/english.asp?download/elconfg.htm.
> In the "Basic Communication" -> "Distributed Clock" section it 
> suggests these devices support DC. But it is not so clear.
>
> I also downloaded the EL2xxx.xml with Beckhoff_EtherCAT_XML.zip.
> There is no <AssignActivate> section for EL2008. But it does have this 
> section for some other devices.
> I also checked EK1100 from the xml files. There is no <assignActivate> 
> section for it either. But I remember that some users of the list 
> using this device as the reference clock.
>
> What am I missing?
>
> Best regards,
> (and selamlar :) )
> Oguz.
>
> By the way, here is the information I get from ethercat master:
> When I type:
> ethercat slaves -v
>
> I get:
> === Master 0, Slave 0 ===
> State: PREOP
> Flag: +
> Identity:
> Vendor Id: 0x00000002
> Product code: 0x044c2c52
> Revision number: 0x00110000
> Serial number: 0x00000000
> DL information:
> FMMU bit operation: no
> Distributed clocks: yes, 64 bit
> DC system time transmission delay: 0 ns
> Port Type Link Loop Signal NextSlave RxTime [ns] Diff [ns] NextDc [ns]
> 0 MII up open yes - 1281615183 0 0
> 1 EBUS up open yes 1 1281615783 600 145
> 2 MII down closed no - - - -
> 3 N/A down closed no - - - -
> General:
> Group: SystemBk
> Image name:
> Order number: EK1100
> Device name: EK1100 EtherCAT-Koppler (2A E-Bus)
> Flags:
> Enable SafeOp: no
> Enable notLRW: no
> Current consumption: -2000 mA
> === Master 0, Slave 1 ===
> State: PREOP
> Flag: +
> Identity:
> Vendor Id: 0x00000002
> Product code: 0x07d83052
> Revision number: 0x00100000
> Serial number: 0x00000000
> DL information:
> FMMU bit operation: no
> Distributed clocks: yes, 64 bit
> DC system time transmission delay: 145 ns
> Port Type Link Loop Signal NextSlave RxTime [ns] Diff [ns] NextDc [ns]
> 0 EBUS up open yes 0 1299932986 0 145
> 1 EBUS up open yes 2 1299933296 310 155
> 2 N/A down closed no - - - -
> 3 N/C down closed no - - - -
> General:
> Group: DigOut
> Image name:
> Order number: EL2008
> Device name: EL2008 8K. Dig. Ausgang 24V, 0.5A
> Flags:
> Enable SafeOp: no
> Enable notLRW: no
> Current consumption: 110 mA
> === Master 0, Slave 2 ===
> State: PREOP
> Flag: +
> Identity:
> Vendor Id: 0x00000002
> Product code: 0x03f03052
> Revision number: 0x00100000
> Serial number: 0x00000000
> DL information:
> FMMU bit operation: no
> Distributed clocks: yes, 64 bit
> DC system time transmission delay: 300 ns
> Port Type Link Loop Signal NextSlave RxTime [ns] Diff [ns] NextDc [ns]
> 0 EBUS up open yes 1 1311888425 0 155
> 1 EBUS down closed no - - - -
> 2 N/A down closed no - - - -
> 3 N/C down closed no - - - -
> General:
> Group: DigIn
> Image name: TERM_DI
> Order number: EL1008
> Device name: EL1008 8K. Dig. Eingang 24V, 3ms
> Flags:
> Enable SafeOp: no
> Enable notLRW: no
> Current consumption: 90 mA
>
>
>
> 03.07.2012 17:05 tarihinde, Ralf Roesch yazdı:
>> Oguz,
>>
>> I don't think that the EL2008 supports DC.
>> You can check it with the
>> ethercat slaves -pXXX -v
>>
>> I have a EL2004 which shows:
>>
>> ethercat slaves -p3 -v
>> ...
>> DL information:
>> FMMU bit operation: no
>> Distributed clocks: no
>> ...
>>
>> If you have a DC-capable Module you can find the <AssignActivate> 
>> mode in the ESI-File (XML).
>> You would find it in the EL2xxx.xml - File from Beckhoff if it would 
>> support DC.
>>
>> selamlar
>> Ralf
>>
>> On Tue Jul 03 2012 15:27:41 GMT+0200, Oguz Dilmac 
>> <odilmac at bilko.com.tr> wrote:
>>> Hi,
>>>
>>> I want to use Distrubuted Clocks.
>>> And to test it, I want to create a square wave on one of the digital 
>>> outputs and watch it on an ossiloscope to see the jitter.
>>> I'm using RTAI with kernel modules.
>>>
>>> I looked to the dc_rtai_sample.c.
>>> I don't have an IDS counter. But I have an EK1100 and EL2008
>>> How can I modify the sample code to activate DC on EK1100 and EL2008
>>>
>>> I know they support DC. But I don't know what to write to 
>>> "assignActivate" code.
>>>
>>> Best regards,
>>> Oguz.
>>> _______________________________________________
>>> etherlab-users mailing list
>>> etherlab-users at etherlab.org
>>> http://lists.etherlab.org/mailman/listinfo/etherlab-users
>>
>>
>>
>
>