Good point.  Thanks for sharing all of your testing and insight.  I have Nick's contact info buried somewhere so I am going to ask him to reply to this post.

My contact has been with Rob and Chris, but I guess they are more of an sales team.  Nick is probably an better bet, will try to get his contact info.   We have been dealing REC for 15...

This dual baud rate issue explains a lot.  I havent had any luck with my contacts at ARCO, but that was a while back.  It might be nice if we could get some insight from them.  I am ...

"REC at 250K and with the cerbo set to 250k bms and the Zeus to Victron follower". EDIT: I noticed now you said Victron Follower. Yes I tried this. And it does not work. It does not read DVC...

Thanks Trond.  This sounds much like my experience.  I was approaching the "rip out the Zeus and replace it" phase. did you happen to try the REC at 250K and with the cerbo set to 250k b...

So far what I have found: NMEA data for Battery, Engine and Charger all neds to be enabled for the Zeus to show up on Cerbo. Disabling this, gives you no data. Just make sure you choose an insta...

@Trond Røsvik I'm on the newer/est version of firmware.  I should be back to the boat in a weekish.  I do know when I changed the comm rate with CANS the bms accepted the change.&n...

@Matt Looking back in older manuals like 2.8 I see that it used to be: CANF 250 and CANF 500  So seems like they changed this in 2.9X.   Just start by sending CANF? or CANS? and see w...

It is likely one of two things 1)  SD card is full 2)  SD card is corrupted. If you remove the 4 screws on the back of the module you will see the SD card.  Push down on the clip ...

@Trond Røsvik thanks.  I'm just blind.  That is what I tried.  Once I get back to the boat I'll try again just to be sure I didn't screw up my first attempt.

@Matt CANS 2 =250 kbps, CANS 3 =500 kbps Page 15: https://www.rec-bms.com/wp-content/uploads/2024/09/UserManual_ABMS_Victron.pdf    

Thanks Trond, once we get our inhouse test engine working and brckets and pulleys made, I will hopefully be able to share some insight

I hooked up an test setup this morning in 30 minutes. No motor or alternator needed really. IF you want to test field current just add an 12V bulb.   Just an Zeus, REC BMS with cells, ...

I did briefly try doing that (changing my rec to 250k and configuring the can for ve.can and bms) but didn't have any luck.  At the time I wasn't putting too much time into it as other project...

@Rick Not sure thats the problem. The fact that you can use the REC on 250kbps in VE.can network is old news. It was an requirement to use the WS500 and this is what I am now testing on Zeus. Bu...

I think you may not have your Cerbo VE.CAN port set correctly.  It needs to be 250k.  Check out this thread for help.  We sent Arco an Active BMS to test last year so they should hav...

Thanks Trond, this is the 2Q Manual and the CHRG instruction does not apply.  Also the Active BMS uses the instruction CANS instead of CANF.  This will be updated in f/w update 2.9.5 to s...

Odd, I'm nowhere near the boat at the moment, but that firmware seems to ring a bell.  Mine did show up on the cerbo as a Victron follower, with the can set to lynx bms ve.can but without the ...

My Zeus automaticly updates to "Zeus Firmware v1.23". An firmware version not yet shown on their webpage, so must be new. I also tested Victron Follow in our Lynx BMS NG setup. And in Victron Fo...

Ok, glad it's not just me.  I did tell ARCO that their documentation sucked...they agreed.   I don't believe that the Zeus participates in DVCC while configured as a rec follower, but at...

Yes, I am seeing the same thing. REC->Zeus works at 500 kbps. (Sync enabled and shows correct data) Zeus-Cerbo works at 250 kbps (Zeus shows up as an device on Cerbo) There is no way to get d...

I was told by ARCO that setting the Zeus to rec follower changed its comm rate to 500k. I briefly tried changing the REC to 250k but the cerbo didn't immediately recognize it.  Admittedly I d...

Trond yes, I've got VE.Can port 2 configured for 500k LV BMS with the REC-A plugged into one of the ports, the other port has the Zeus connected with a 25' cat6 network cable and a terminator in t...

There is already another thread on this subject. Interesting that you got the Zeus to follow the REC A-BMS using 500 kbps. Are you seeing the Zeus confirming that it IS synced to the A-BMS? &nbs...

just started happeneing.  reboot nothing.  i am guessing the only thing is causes is no logging is that right?   everything else is working other than i am still playing with setti...

I've got a Rec active that's feeding a Victron system with a cerbo.  The Active is connected to one of the VE.CAN ports with the can set to 500k bms.  So far all good.  The Zeus is a...

@Rick Yes, I know. I have good contact with Arco technical team, so will probably figure this out.   Other than that, the Zeus is performing well. I have dual 12V275A on one motor, and I a...

Hey Trond, I am still a few weeks away from being able to test but will report back when I can.  Remember not to use the black WS500 terminator anywhere as its on the wrong pins.  If you ...

@PeterD Thanks for your input on this Peter.  Some great troubleshooting tips  :)   We are in the process of setting up a full Master/Slave test system in our new shop.  As part...

With Wakespeed WS500 you can setup the battery temperature sensor to work as an second alternator sense.  I have been using this in 2 years and works great.  Whatever alternator is hottes...

CANS is an command described in the manual for ABMS. It lets you change the bitrate of the data.    CHRG is an command that lets you change the protocol and this command is not support...

I can for an short period see that it does see the data from REC, for an blink of an second. But only for like 1% and then 99% it does not sync.  It even messes up the communication between ...

Has anyone found an solution here?  Just swapped my Wakespeed for an Zeus and can NOT get it to sync from the REC BMS. I know the PIN-out is different from WS-500 to Zeus. Zeus and Cerbo ha...

I do agree 100 % with @Peter Domenicali and think that the corrected sketch he uploaded is correct. Thank you Peter for putting so much effort in. Nevertheless I would wish that either Rick ...

@Rob Just to be clear, while I am certain about what I am showing in the Diagram PDF that I uploaded 17 hours ago, OGM Energy, represented by Rick, must be the final arbiter. After all, they are yo...

Martin, in his original posting above, correctly identified the wire colors and meanings connected to the DB9: Pin 1: Black cable = Shield Pin 2: Gray cable = GND Pin 3: Green cable = RS485 Sign...

Hi Rick and Rob, With all due respect, Rick, I believe you have the two "+5V" lines mixed up. Looking at the product manual from REC, the pins are all clearly described, and I have verified the wi...

Just updated DB9 pin numbers and added a Slave to slave pinout section to the Master Slave Pinouts diagram.  Thanks to PeterD for catching it.  You can download it here: https://rec-bms-...

@tom look under devices/rec/pArameter/CVL. I think here you see 13.4 /13.3 means REC send a float voltage to your charger. This means bulk 14.0V was finished. If battery is discharge to 95%, it w...