Difference between revisions of "Using SSI encoder"
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# Select SSI Encoder from {{Param|FBD}} | # Select SSI Encoder from {{Param|FBD}} | ||
# Select SSI type from {{Param|FBS}} | # Select SSI type from {{Param|FBS}} | ||
| − | # Set number of MT and ST bits into parameters | + | # Set number of MT and ST bits into parameters {{param|FBST}} and {{param|FBMT}}. If MT not specified in encoder data sheet, set it zero. |
[[Category:IONI_features]] | [[Category:IONI_features]] | ||
[[Category:IONI_user_guide]] | [[Category:IONI_user_guide]] | ||
[[Category:IONI_wiring]] | [[Category:IONI_wiring]] | ||
Revision as of 12:02, 8 February 2017
SSI (Synchronous Serial Interface) is a digital protocol used by many encoder feedback device manufacturers. IONI Pro servo drive supports SSI encoders starting from firmware version 1.6.1.
SSI support details
As SSI is loosely defined standard, drive's SSI support does not cover all possible variations of the protocol. The following list includes currently supported SSI encoders:
- AMS 12 bit SSI encoders
Current firmware version limitations:
- No absolute encoder information is utilized, motor still needs to do Phasing a.k.a. phase search and Homing to get absolute operation.
Wiring SSI encoder
Wiring of SSI depends on the variant of SSI protocol present.
AMS SSI encoder chips
AMS SSI encoders are wired following way to IONI encoder connector:
| AMS wire | IONI drive pin | IONICUBE D-Sub 15 pin number | Remarks |
|---|---|---|---|
| VSS (Ground) | GND | 10 | |
| VDD5V (5V input) | 9 | Pin 9 is 5V supply output from IONICUBE to encoder | |
| CLK | GPI3 | 11 | |
| CSn | GPI2 | 12 | |
| DO | GPI1 | 13 |
Refer to IONI & IONICUBE user guide for more info on wiring encoders.
Configuration
To configure SSI, use Granity version 1.11.1 or later. Configuration steps:
- Find out encoder MT and ST resolutions from encoder manufacturer's data sheet
- Select SSI Encoder from Feedback deviceFBD
- Select SSI type from Serial encoder typeFBS
- Set number of MT and ST bits into parameters Single-turn bitsFBST and Multi-turn bitsFBMT. If MT not specified in encoder data sheet, set it zero.
