The B&R 8LS series motors are starting to come equipped with a new hybrid power/feedback connector. These motor models can be identified by these feedback types in their model code: S0, S1, S2, S3, etc. B&R is storing a new memory data format in these specific models that we don't yet fully decoded.
We offer a mating test cable for these hybrid connectors which is the TI-5786, however, you can also test the encoder using one of our standard "direct-to encoder" test cables such as the TI-5668 or the TI-5079.
This hyrbid connection does not include the incremental 1Vpp A and B signals, so the Line Levels test will not be used, and the TI-5101 adapter module is not required.
Below are the pinouts of the hybrid connector.
As can be seen below, our current B&R Memory Test reports will often look incorrect since we are not yet decoding this newest memory format. In particular, the highlighted fields in red pictured below are not correct, while the green fields appear to be accurate. Do not use the alignment data from our current reports on these new hybrid connections. Please record the incoming alignment for +U-V and +U-W and send to us with the encoder memory file for further development.
After reviewing many of these new hybrid encoder files, we are beginning to suspect that B&R is no longer storing a unique alignment (commutation offset) in the encoder memory. We have seen several new drives comes out recently that appear to 'auto-phase' to however the encoder is aligned to the motor. Even this literature from B&R seems to confirm this on their latest ACOPOS drives.
Our best advice for now for servicing these motors is to put the encoder back to the angle it came in at. The encoder shaft is often keyed to the motor. They also have markings on the encoder body and motor frame that indicate which of the three possible positions it was originally set to.
We are working on our B&R memory test software to better present these new hybrid files. Even though the current report does not display some of the hybrid data correctly, you can still save and program these hybrid memory files successfully with our software.
Comments
0 comments
Please sign in to leave a comment.