12-26-2016 11:56 AM
hi, i need to acquire a measurement from an absolute encoder (model AEN500 serial). Can i use a compactRIO NI 9251 with a SEA 9521 BiSS/SSI interface module? is there something cheaper?
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12-28-2016 12:02 PM
Hi Yiug89,
as far as I know and according to our internal portal, only S.E.A. is providing this kind of product. This c-series module (SEA 9521 BiSS/SSI interface module) is not supported by National Instruments. I suggest you to contact directly S.E.A. in the way to have the correct answers about this topic. Furthermore, I didn't find any concrete plans of developing any NI hardware right now. I'm so sorry, but I think It's better for you to contact directly SEA.
Kindly regards,
Stefano Fois
National Instruments Italy - Application Engineer
12-29-2016 03:28 AM
i'm sorry but SEA 9521 hardware manual says that "SEA 9521 BiSS Interface Module with 3 * BiSS interfaces to connect absolute digital position encoder to the CompactRIO system from National Instruments"
however, is there any NI device i can use with a compactRIO system to read from a absolute encoder?
12-29-2016 04:01 AM
also i made a typing mistake in the main message: it's compactRIO NI 9151 not NI 9251
01-02-2017 10:42 AM
Hi yiug89,
I felt that what you had wrote was a typo... don't worry!
However that's the point: NI seems not interested to invest in the developing of devices or systems involved to the implementation of the BiSS protocol. Furthermore, although the SEA 9521 c-series module is compatible with the NI-9151 (according the SEA specifications), I'm not able to give you any support, just because I'm not allowed to do this: the NI service for this product is not supported.
What about your question:
"...is there any NI device i can use with a compactRIO system to read from a absolute encoder?"
the answer is: yes, there are some solution to read the data from an absolute encoder with NI product, if the data are transmitted in:
- SSI (Syncronous Serial Interface) someone has develop some examples. Have a look to this link... http://digital.ni.com/public.nsf/allkb/862567530005F09C862566BE004E469D
- CAN (Control Area Network) with the XNET drivers...
- Profibus...
- DeviceNet...
... and some other bus or industrial protocols... but not the BiSS.
Stefano Fois
Application Engineer - NI Italy