Hello Ian
Are you trying to get an application running in real time to talk to
your X-screen? If that is true, you're in for trouble IMHO :(
Regards
Richard
Am 02/04/2013 12:06 PM, schrieb Ian Norton:
Hi,
I have a very strange problem.
I'm running V1.5 in user mode. My app clocks the bus at 1KHz with
ecrt_domain_queue/ecrt_master_send
/ecrt_master_receive/ecrt_domain_process and get my data back with
EC_READ's.
Devices on the bus vary, but include Kollmorgen S300, Festo pressure
regulators, Beckhof ADC/DAC. I have 7 systems working fine in the field.
So now we've upgraded the Kollmorgen S300's to AKD drives. Fairly
straightforward move you might think.
Not so! After an internal initial homing process, the angular positional
data returned from the drive would not show any change, even though the
attached motor was turning. After a time (variable, and anything from .5
secs to 10 secs), a new value would be returned which is massively
different from the previous "static" value, now reflecting the true
position of the motor.
My app is an X windows program, and by chance I noticed that if I
perfomed a Window manager function, i.e. move a terminal window on top
of my app, it kick started new data to be retrieved from the bus!?
The code driving the bus has a heartbeat, which never misses a beat,
even when returned data is not changing, so I'm happy the ecrt routines
are being called continuously.
I use ecrt_master_state and ecrt_domain_state to look for errors but get
none.
So I'm wondering how the master can return the same data to me when it
is clearly changing at the device. After all, with no errors, it must
think data has been exchanged.
And, why does an X window manager kick a transfer off? How can it be
linked to the network?
Anyone had similar issues?
regards
Ian R.K. Norton
System Support Engineer
Aircraft Engineering
Cranfield Aerospace Ltd
Cranfield
Bedford MK43 0AL
UK
Tel - +44 (0) 1234 754926
Fax - +44 (0) 1234 752375
'All technology information within this Email has been Exported from the
United Kingdom under Open General Export Licence (Technology for
Military Goods) - BIS Reference: GBOGE2008/00462'
************************************************************
DISCLAIMER:
This email and any attachments are confidential to the intended
recipient and may also be privileged. For those other than the recipient
any disclosure, copying, distribution, or any action taken or omitted to
be taken in reliance on such information is prohibited and may be
unlawful. If you are not the intended recipient please delete it from
your system and notify the sender immediately by telephoning +44(0) 1234
754978 or by immediate reply via e-mail to the Sender.
Should the content of this Email, including any attachments, require an
Export Licence, this shall have been registered in compliance with
export controls laid down by the UK Export Control Organisation, which
forms part of the UK Department for Business, Innovation and Skills (BIS).
Emails and other electronic communication with Cranfield Aerospace may
be monitored.
Thank you.
Cranfield Aerospace Limited Registered in England No. 2415720 Registered
Office: Cranfield University, Cranfield, Beds, MK43 0AL
Updated 14-July-2010
Disclaimer added by *CodeTwo Exchange Rules*
www.codetwo.com <http://www.codetwo.com>
_______________________________________________
etherlab-users mailing list
[email protected]
http://lists.etherlab.org/mailman/listinfo/etherlab-users
Mit freundlichem Gruß
Richard Hacker
--
------------------------------------------------------------------------
Richard Hacker M.Sc.
[email protected]
Tel.: +49 201 / 36014-16
Ingenieurgemeinschaft IgH
Gesellschaft für Ingenieurleistungen mbH
Heinz-Bäcker-Str. 34
D-45356 Essen
Amtsgericht Essen HRB 11500
USt-Id.-Nr.: DE 174 626 722
Geschäftsführung:
- Dr.-Ing. T. Finke,
- Dr.-Ing. W. Hagemeister
Tel.: +49 201 / 360-14-0
http://www.igh-essen.com
------------------------------------------------------------------------
_______________________________________________
etherlab-users mailing list
[email protected]
http://lists.etherlab.org/mailman/listinfo/etherlab-users
