prbt Posted March 29, 2014 Share Posted March 29, 2014 Hi, I got a question for ACC-24E3 of PPMAC. The motor used is AKM(made by kollmorgen), drived by S700, provided with an multi-turn absolute sinusoidal encoder. Now I want to use the synchronous serial absolute-encoder emulation from its SSI interface(X5) as the position feedback for 24E3. Now I need to set a user-defined absolute zero position for the motor instead of using the original absolute zero position provided by SSI interface. I wonder if it is accessable for Power PMAC. How to do it (Homing Offset)? Thank you! Prbt Link to comment Share on other sites More sharing options...
Richard Naddaf Posted March 31, 2014 Share Posted March 31, 2014 Usually, when people refer to emulated data it is quadrature, which cannot be read absolutely. So, I am not sure if you actually have SSI data wired into the ACC-24E3. But if you do, yes you can set up: Motor[].pAbsPos Motor[].AbsPosFormat Motor[].AbsPosSF Motor[].HomeOffset in the traditional manner Then issue a HOMEZ on power up or configure Motor[].PowerOnMode to read it automatically (make sure the encoder power is supplied when the PMAC comes up). Link to comment Share on other sites More sharing options...
prbt Posted April 1, 2014 Author Share Posted April 1, 2014 Thanks for your reply. I check the S700 drive manual. S700 drive can supply users with "synchronous serial absolute-encoder emulation by its SSI interface (X5, which is a D-sub 9-pin connector)". Five pins may be essential for the encoder wiring because the power supply of encoder emulation is provided by S700 itself. Shall I have to connect the encoder power supply? Link to comment Share on other sites More sharing options...
curtwilson Posted April 1, 2014 Share Posted April 1, 2014 If the encoder is separately powered, you do not need to supply the 5V from the Power PMAC. The "strobe" signal is not used in the SSI protocol, so it does not need to be connected. Link to comment Share on other sites More sharing options...
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