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<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Note that this sort of question belongs on the users list, not the dev list.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">When you are commissioning a particular network, you first run “ethercat slaves” to view the list of existing slaves on the network. This will show both their position-based address and their alias-based
address.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">You can optionally run “ethercat alias” with additional parameters to specify a specific slave (usually using -p alone, but optionally with some combination of -a and -p if you want to reassign the
alias of a slave, or use an existing alias as a base position). This will set the alias of the specified slave, allowing it to be used in alias-based addressing later.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">See “ethercat slaves --help” and “ethercat alias --help” for more information.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Giving slaves an alias is optional, but it can be useful where you have a non-linear network or if devices can be reordered without recommissioning. Either way your application needs to use matching
addressing.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">From application code, you use ecrt_master_slave_config() to begin defining the slave configuration. This works with either position-based or alias-based addressing; see the documentation for that
method for more information.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span lang="EN-US"> Lingjie_Kong@amat.com<br>
<b>Sent:</b> Friday, 1 June 2018 05:35<br>
<b>To:</b> etherlab-dev@etherlab.org<br>
<b>Subject:</b> [etherlab-dev] Alias Addressing<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I have a question regarding alias addressing. In page 12 of the 1.5.2 ethercat manual, it says that slave position can be specified by position addressing or alias addressing and refer to 7.1.2.
<span style="color:#1F497D"><o:p></o:p></span></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">In 7.1.2, it says setting alias address by doing
<o:p></o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-US">ethercat alias [option] <alias><o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span lang="EN-US"><o:p> </o:p></span></b></p>
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<li class="MsoNormal" style="mso-list:l1 level1 lfo3"><span lang="EN-US">However, my question is that does this command actually address slave by its alias number and configure network as alias address for all slaves?
<o:p></o:p></span></li><li class="MsoNormal" style="mso-list:l1 level1 lfo3"><span lang="EN-US">Meanwhile, does etherlab actually support alias address?
<o:p></o:p></span></li><li class="MsoNormal" style="mso-list:l1 level1 lfo3"><span lang="EN-US">If so, how to address number of slaves by its alias?<o:p></o:p></span></li><li class="MsoNormal" style="mso-list:l1 level1 lfo3"><span lang="EN-US">If each slave has different PDO mapping, how to address the PDO mapping for each slave based on alias.<o:p></o:p></span></li></ol>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">-Lingjie<o:p></o:p></span></p>
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