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Internal SDO requests are managed by master FSM and can conflict with external requests managed by slave FSM. The internal SDO requests includes SDO requests created by an application and external request are typical created by EtherCAT Tool for SDO upload/download or a directory fetch initiated with ethercat sdos command. The conflict will cause a FPWR from an external request to be overwritten by a FPWR from an internal SDO request (or oppersite) in the same "train" of datagrams.
------------------------------------------------------------------------------ This is the README file of the IgH EtherCAT Master. $Id$ vim: spelllang=en spell tw=78 ------------------------------------------------------------------------------ Contents: 1) General Information 2) Requirements 3) Building and installing 4) Realtime & Tuning 5) License 6) Coding Style ------------------------------------------------------------------------------ 1) General Information ====================== This is an open-source EtherCAT master implementation for Linux 2.6. See the FEATURES file for a list of features. For more information, see http://etherlab.org/en/ethercat. or contact Dipl.-Ing. (FH) Florian Pose <fp@igh-essen.com> Ingenieurgemeinschaft IgH Heinz-Baecker-Str. 34 D-45356 Essen http://igh-essen.com ------------------------------------------------------------------------------ 2) Requirements =============== 1) Software requirements Configured sources for the Linux 2.6 kernel are required to build the EtherCAT master. 2) Hardware requirements A table of supported hardware can be found at http://etherlab.org/en/ethercat/hardware.php. ------------------------------------------------------------------------------ 3) Building and installing ========================== See the INSTALL file. ------------------------------------------------------------------------------ 4) Realtime & Tuning ==================== Realtime patches for the Linux kernel are supported, but not required. The realtime processing has to be done by the calling module (see API documentation). The EtherCAT master code itself is passive (except for the idle mode and EoE). To avoid frame timeouts, deactivating DMA access for hard drives is recommended (hdparm -d0 <DEV>). ------------------------------------------------------------------------------ 5) License ========== Copyright (C) 2006-2009 Florian Pose, Ingenieurgemeinschaft IgH This file is part of the IgH EtherCAT Master. The IgH EtherCAT Master is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License version 2, as published by the Free Software Foundation. The IgH EtherCAT Master is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with the IgH EtherCAT Master; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA --- The license mentioned above concerns the source code only. Using the EtherCAT technology and brand is only permitted in compliance with the industrial property and similar rights of Beckhoff Automation GmbH. ------------------------------------------------------------------------------ 6) Coding Style =============== Developers shall use the coding style rules in the CodingStyle.txt file. ------------------------------------------------------------------------------