# Ssi encoder with special bits

**URL:** <https://forum.deltamotion.com/t/ssi-encoder-with-special-bits/1248>\
**Category:** Sensors\
**Created:** [March 4, 2024, 5:05am UTC](https://forum.deltamotion.com/t/ssi-encoder-with-special-bits/1248 "2024-03-04T05:05:57Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Sunxiaoxing](https://forum.deltamotion.com/letter_avatar_proxy/v4/letter/s/77aa72/32.png) [@Sunxiaoxing](https://forum.deltamotion.com/u/Sunxiaoxing)\
**Post date:** [March 4, 2024, 5:05am UTC](https://forum.deltamotion.com/t/ssi-encoder-with-special-bits/1248/1 "2024-03-04T05:05:57Z")

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Hello I have a P+F AHM58 ssi encoder with spcial bits, the signal information like the pic. i want to know this ssi encoder data can be readed by rmc?  
i want to use a u14 module to receive then data of then encoder

 ![mmexport1709527956020](https://forum.deltamotion.com/uploads/default/original/1X/ab880ab4fd9e4a301b349ff081df7fd8c542a9e8.jpeg)

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**Author:** ![Sunxiaoxing](https://forum.deltamotion.com/letter_avatar_proxy/v4/letter/s/77aa72/32.png) [@Sunxiaoxing](https://forum.deltamotion.com/u/Sunxiaoxing)\
**Post date:** [March 4, 2024, 11:12am UTC](https://forum.deltamotion.com/t/ssi-encoder-with-special-bits/1248/2 "2024-03-04T11:12:51Z")

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i see " SSI Low Bits to Ignore" and " SSI High Bits to Ignore" in helps .  
Maybe it is the key to read data from encoder with special bit

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**Author:** ![Paul\_Huumala](https://forum.deltamotion.com/letter_avatar_proxy/v4/letter/p/22d042/32.png) [@Paul\_Huumala](https://forum.deltamotion.com/u/Paul_Huumala)\
**Post date:** [March 4, 2024, 9:04pm UTC](https://forum.deltamotion.com/t/ssi-encoder-with-special-bits/1248/3 "2024-03-04T21:04:33Z")

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Correct, the **SSI Low/High Bits to Ignore** feature was designed for this purpose.