Editing IONI device model comparison

The main difference between IONI and IONI Pro is that Pro model will get more advanced functions as downloadable upgrades. The planned additions are:

*Notch filter for advanced vibration damping
*Support for EtherCAT field bus (through separate EtherCAT to [[SimpleMotion V2]] bridge device)
*True [[dual-loop feedback position control]]
*SinCos 1 Vp-p encoder support
*Serial encoder support (TBD)

==Comparison==
The table below summarizes the full list of differences currently:

{| class="wikitable"
|-
! Feature !! IONI !! IONI Pro
|-
| Max encoder count rate || 0-4 MHz || 0-18 MHz
|-
| Encoder resolution || 100-65535 P/R || 100-15000000 P/R
|-
| Pulse/dir [[setpoint]] frequency || 0-4 MHz  || 0-8 MHz
|-
| Quadrature [[setpoint]] frequency || 0-1 MHz  || 0-2 MHz
|}