Heidenhain ENDat

[Paulserv]

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Heidenhain EnDat encoders have an specific 8-digit ID Numbers. Happens to encoders from same type to have several ID's.
You have a broken ECN 1313 ID Nr 586 640-09 and need to replace it with a new one from market. If you are a lucky man, You only find an ECN 1313 from stock market, but with another ID Nr like 768 295-54.
The same thing happen with other types of EnDat encoders from Heidenhain, and the problem is When you are to program a new encoder according to an old, Just you can't. I mean you can't write completely the memory of old one to the new, and there will be always some characters difference when you compare the memory of two encoders. I am not sure, maybe for difference in ID Nr or something else.
Additionally there is some code on these encoders like "V1" or "N8" ... maybe some secret code.
And of course there are some versions of EnDat progressing from bottom to top like EnDat01 or Endat 2.1 or EnDat 2.2 ...



Suppose you have an EnDat encoder with a position bit error, need to replace it,

What are the rules for a good choice when you need to choose an EnDat?

Best regards
Paul

 

[zako]

What are the rules for a good choice when you need to choose an EnDat?

You will want to evaluate the encoder in a drive or controller. Take a system that supports your requirement on the control or drive side.
Endat can indeed some comfort functions on the encoder side, but this has disadvantages when replacing the encoder. Therefore, it makes sense if something like this is handled on the control or drive.

 

[Paulserv]

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Thanks zako

I think you are saying something like this:

Suppose you have e.g. ECN 1313 (positions/rev: 13 bits EnDat 2.2/01) encoder your motor, your drive/controller support ECN 1325 (positions/rev: 25 bitsEnDat 2.2/22) or EQN 1337 or EQN 437 too, all with the same size of course. One can use each of these according to her requirement.

But you have a B&R servo system running a B&R servo motor or other brands that can run under B&R EnDat memory protocol like BAUMULLER or STOBER or ...
The B&R systems can run a vast range of Heidenhain EnDat , But you need to program the encoder memory before (contains motor specs and constants in it).

The question is are the members of these aformentioned EnDat's are compatible for programming the memory according to your old encoder?

Best regards
Paul