Thanks. I tried the second option (used ecrt_master_sdo_download) and it worked.
Best, Mohsen On Wed, Sep 26, 2018 at 2:45 AM, Gavin Lambert <gavin.lamb...@tomra.com> wrote: > There’s a number of different ways to do it, depending on why and how you > want to do it. > > > > If this is a configuration setting (especially if it needs to be re-sent > every time the slave reboots) that you can write (without needing to read > anything), then you should use one of the ecrt_slave_config_sdo*() > methods. This will not do it immediately but will do it when you activate > the master, and also if the slave reboots at any time while the master is > active. > > > > If it’s a one-off request/query which you only do before activating the > master, then you should use one of the ecrt_master_sdo_*() methods. This > will execute immediately and wait for the response. > > > > If you want to do it while the master is active, then you can either call > ecrt_master_sdo_*() from a separate (non-realtime) thread (at the cost of a > little extra latency on the realtime cycle), or you can use > ecrt_slave_config_create_sdo_request() and related methods to perform > polling on the realtime thread (for some extra code complexity). > > > > If it’s just something you need to do during commissioning and then never > again (eg. if you can save the setting to the slave permanently), then you > can use the “ethercat download” command. > > > > *From:* Mohsen Alizadeh Noghani > *Sent:* Wednesday, 26 September 2018 03:41 > *To:* etherlab-users@etherlab.org > *Subject:* [etherlab-users] Read from/write to the slave's object > dictionary using SDOs > > > > Hello everyone. > > > > How can I read from or write to an entry of a slave's object dictionary > using SDO? I'm going to do this before my real-time task. > > For example, I would like to set the value of 0x6040 to 15 before my > cyclic task. > > > > Best, > > Mohsen >
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