Title: Bitfile for 7i97T + 7i74 with 8x BiSS-C (RLS LA11 absolute encoders)

Hi all (and hopefully PCW),

I am retrofitting a large gantry mill (dual X drives, Y, Z, with A/B planned later) from an old PMC DCX-AT200 controller to LinuxCNC. The analog AMC servo drives will be kept and driven by a 7i97T.

For absolute position feedback I have six RLS LA11 ( readheads (BiSS-C variant A, up to 2.2 MHz, 26-bit position + E/W + 6-bit CRC) that will read AS10 magnetic scales mounted on the axes.

My plan:
- 7i97T: 6x +/-10V analog out + incremental motor encoders
- 7i74 on the DB25 expansion port: 8x BiSS-C channels (6 used, 2 spare)
- 7i84 on the onboard SSerial port for tool changer I/O (so SSerial should stay active)

Is there an existing bitfile for the 7i97T with the 7i74 configured as 8x BiSS, or could one be generated? And is there anything I should watch out for regarding BiSS clock rates with cable runs of 5-10 m on a large gantry?

I found the working BiSS channel config for a 26-bit encoder ( at 2 MHz) in the 6i25+7i85 thread, so I mainly need the matching bitfile for the 7i97T+7i74 combination.

Thanks a lot in advance!