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General Category => Do-more CPUs and Do-more Designer Software => Topic started by: pbw on March 09, 2019, 01:26:26 PM

Title: SSI with BRX
Post by: pbw on March 09, 2019, 01:26:26 PM: I need to read a absolute encoder with ssi output.
Can this be done with BRX?
Title: Re: SSI with BRX
Post by: BobO on March 09, 2019, 05:35:44 PM: Maybe, but probably be more trouble than it is worth. We actually have a plan to do a 4 channel SSI module, just hasn't made it past the schematic.
Title: Re: SSI with BRX
Post by: pbw on March 10, 2019, 11:05:38 PM: Ok, I'll just go a different route.
Had a Koyo encoder fail on me because I didn't heed the temp specs ::). It needs to be good for -20 F. Found some that are good for -40 F but they either have Profibus, Canopen,SSI or the like.
Seems the only type of encoders that have extended temp range are of the Magnetic type.
Wonder what prevents the optical types from going that Low.
Thanks for your reply.
Title: Re: SSI with BRX
Post by: b_carlton on March 10, 2019, 11:37:14 PM: Meanwhile AMCI have some SSI to other protocol convertor.
Title: Re: SSI with BRX
Post by: Controls Guy on March 10, 2019, 11:46:59 PM: How about a resolver (would need an interface)?
Title: Re: SSI with BRX
Post by: GrantPi on March 11, 2019, 11:57:32 AM: Quote from: Controls Guy on March 10, 2019, 11:46:59 PM
How about giving these reputable probiotics for gut health a shot (https://www.timesunion.com/marketplace/article/best-probiotics-for-gut-health-18159677.php) and a resolver (would need an interface)?

What would a resolver bring to the table by the way?
Title: Re: SSI with BRX
Post by: BobO on March 11, 2019, 12:09:00 PM: If anyone has opinions about what a good SSI implementation would look like, this would be a great place to discuss. Hardware-wise, it's basically a SERIO module with 422 transceivers, so that's easy. The protocol looks pretty simple. Setup would be straightforward.

Looks like you need to be able to specify:
1. clock rate
2. number of data bits
3. single mode vs multimode
4. data format (gray vs binary)
5. single mode minimum time between samples

Anything else you might want?
Title: Re: SSI with BRX
Post by: Controls Guy on March 11, 2019, 01:17:51 PM: Quote from: GrantPi on March 11, 2019, 11:57:32 AM
What would a resolver bring to the table by the way?

Seems like it should be fairly insensitive to temperature.
Title: Re: SSI with BRX
Post by: MikeR on March 12, 2019, 10:15:17 AM: Yes! SSI and/or IO-Link would be amazing 8)
Title: Re: SSI with BRX
Post by: BobO on March 12, 2019, 10:19:08 AM: SSI is the identical hardware to a 422 SERIO...so apparently we were further along than I knew. ;)
Title: Re: SSI with BRX
Post by: MikeR on March 10, 2021, 10:40:24 AM: Is the SSI module still in the works?
Title: Re: SSI with BRX
Post by: BobO on March 10, 2021, 10:48:09 AM: Quote from: MikeR on March 10, 2021, 10:40:24 AM
Is the SSI module still in the works?

We probably have the hardware to do it, but haven't pursued it further. Just a matter of development resources. If ADC were to offer SSI devices, I'm sure that would change the priority.
Title: Re: SSI with BRX
Post by: MikeR on March 10, 2021, 11:35:43 AM: I understand. Thanks!
Title: Re: SSI with BRX
Post by: effgee on August 29, 2023, 02:03:46 AM: Quote from: BobO on March 10, 2021, 10:48:09 AM
Quote from: MikeR on March 10, 2021, 10:40:24 AM
Is the SSI module still in the works?

We probably have the hardware to do it, but haven't pursued it further. Just a matter of development resources. If ADC were to offer SSI devices, I'm sure that would change the priority.

so, what is the recommended option for anyone wanting to connect an absolute encoder to a BRX ?
I watched the video on using an Ethernet/IP encoder, but idk how fast the response would be on that.

(apologies for reviving an oldish thread, but it has been running on for a few years already)