https://forge.codesys.com/forge/talk/Engineering/thread/4084e091fc/2020-02-27T13:50:51.609000ZRecent posts to SDO_WRITE 4byte Index2020-02-27T13:50:51.609000Z2020-02-27T13:50:51.609000Zstephan-Khttps://forge.codesys.com/u/stephan-k/https://forge.codesys.com029f88e14c4394e2c3e20cca0d2d447e5883a7b2

<div class="markdown_content"><p>Thank you for the feedback.</p> <p>It was en error to do with the data variable being written. With SDO_WRITE I needed to dynamically change WRITE_SDO.Datalength variable based on data type being transmitted.</p></div>

2020-02-27T13:50:51.473000Z2020-02-27T13:50:51.473000Zjosepmariaramshttps://forge.codesys.com/u/josepmariarams/https://forge.codesys.com9011bbd4ac157b7a46e0f59b4b49cab990ea0e31

<div class="markdown_content"><p>Sorry. Via sdo you cant write an 8bytes message.</p> <p>Try with write2 or write 1</p> <p>Enviat des del meu Aquaris M5.5 usant Tapatalk</p></div>

2020-02-27T13:50:51.020000Z2020-02-27T13:50:51.020000Zjosepmariaramshttps://forge.codesys.com/u/josepmariarams/https://forge.codesys.com06daca087a3a439751d3c3f65266c14223fe4553

<div class="markdown_content"><p>The error is about the variable that you try to write, try with write8 or write2.</p> <p>Enviat des del meu Aquaris M5.5 usant Tapatalk</p></div>

2020-02-27T13:50:50.886000Z2020-02-27T13:50:50.886000Ztimvhhttps://forge.codesys.com/u/timvh/https://forge.codesys.com743723d0c5c1100badf39ca61a826877c6570518

<div class="markdown_content"><p>An SDO message is 8 bytes in total:<br/> 1 for the command<br/> 2 for the index<br/> 1 for the sub-index<br/> 4 for the data bytes</p> <p>The maximum value of a WORD is 16#FFFF, this means you can also access index 16#5999</p></div>

2020-02-27T13:50:50.741000Z2020-02-27T13:50:50.741000Zstephan-Khttps://forge.codesys.com/u/stephan-k/https://forge.codesys.combd6565596633be8e6a9a1b36ee9597cec8b17afc

<div class="markdown_content"><p>I'm trying to use the CIA405.SDO_WRITE4 function to write a SDO to a device. My issue is the index input (SDO_WRITE4.INDEX) is of type WORD but I am trying to write a SDO in the Manufacturer Specific range (ie index 16#5999). This index value is 4 bytes but a WORD is only 2. </p> <p>Im getting SDO_WRITE4.ERRORINFO 101122066 or 0607 0012h which from the abort code represents: "Data type does not match; length of service parameter too high."</p> <p>Any ideas? Is there another way to write higher indices SDO?</p> <p>Thanks.</p></div>