Fanuc serial pulse coder support for Argon servo drive

As Fanuc servo motors are quite common target for drive retrofitting, it was tempting idea to make native support for their serial communication based encoder on Argon drive.

The protocol seems quite straightforward based on the details people have found out. So without much wasting time, I purchased a Fanuc motor and hooked it on the drive. Argon encoder port has total of three programmable RS422 inputs and two RS485 inputs/outputs which would make it possible to communicate with almost any kind of serial encoder.

Fanuc servo motor with serial pulse code connected to Argon drive

Fanuc “red cap” servo motor with serial pulse code connected to Argon drive

Fanuc encoder outputs data in form of asynchronous serial communication that is transmitted and received by UART. During testing, it occurred to me that encoder outputs very unusual 76 bit word with single start and stop bit. Standard UART support 5 to 8 bit words so the internal UART of drive’s microcontroller will not help here. Implementing a custom 76 bit 1024 kbps serial receiver with bare software would be so tricky that plan of supporting Fanuc protocol is unfortunately looking quite improbable at the moment.

The working solutions for using a Fanuc motor are:

Most of serial encoder protocols (SSI, BiSS, etc) use SPI style transmission which is way easier to implement on software. Plan of supporting those is in the future plans, we just need some hardware and time to begin with.

6 thoughts on “Fanuc serial pulse coder support for Argon servo drive

  1. Great , thanks for this try , will you support commutation tracks from fanuc quardarture encoder ? it’s not a standard hall.

    Regards .

    • That should be possible. We’ll take a look on it if we come by a motor with Fanuc commutation track output (these are not available from serial encoder we have).

  2. Since I see author has floor knowledge it the subject in addition to some practical experience.
    This kind of info is always more favorable than copypasted blog articles ideas.

  3. Exactly what a great piece. Excellent, really.
    There are so many con artists online claiming they will know the
    matter. But in reality, it’s just you and https://romeoareateaparty.org who
    truly really know what they create about. I appreciate genuine content and I
    seem like a lot of your current readers do, too.

  4. After reading this article I feel just like you might be my
    favourite writer now. The article is a structured and well-thought one.
    It reminded me around https://ESSAYWRITENOW.COM BUY AN ESSAY SERVICE.

    Looks just like the writer really understand
    the case in point. This piece truly is a good read. Therefore many interesting
    facts I did not know before. Thank you for a fantastic work.
    Keep it up at the future!

Leave a Reply to Abshire Cancel reply

Your email address will not be published. Required fields are marked *

* Copy This Password *

* Type Or Paste Password Here *

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>