Closed loop with Rosie/ Barcelona /hawksbay

[ClassicCrazy]

Does the Canbus from batteries need the ground ? Or just Can Hi and Can Lo wires ?
Larry

[mahendra]

Does the Canbus from batteries need the ground ? Or just Can Hi and Can Lo wires ?
Larry

I was pondering on the same question

[FNG]

Just the Can Hi and Can Low

[mahendra]

Just the Can Hi and Can Low

So I am guessing Rosie/Barcelona/Hawkes Bay would communicate with any battery that uses the same protocol type (Pylon) like EG4, Pytes, SOK etc.

How would this play out with the Midnite Wbjr?
Would they share data, combined or work independently?
Should there be concerns about communication issues because of this?

Thanks in advance.

[RidetheLightning]

Posted by FNG - Today at 08:09:46 AM

Just the Can Hi and Can Low

Point-of-Fact: Per ISO standards, CANBus cables shall always have a grounded shield in order to "drain" interference that may cause reflections or worse. 
This also goes for the connections, ground should be continuous bus end to bus end. 
GND shall not be the NEG or "Low".
This points to the use of "shielded" cable w/ shielded RJ45 connectors.

Many non-automotive CANBus systems use 1 Pin as Ground that is also continuous to the Female RJ45 metal receptacle case, the Bus GND, and Earth (or Frame).

RTL

[FNG]

Just the Can Hi and Can Low

So I am guessing Rosie/Barcelona/Hawkes Bay would communicate with any battery that uses the same protocol type (Pylon) like EG4, Pytes, SOK etc.

How would this play out with the Midnite Wbjr?
Would they share data, combined or work independently?
Should there be concerns about communication issues because of this?

Thanks in advance.

When you close loop a Rosie/Hbay/Bclna with a battery the Battery voltage, Battery temperature, Battery current, Battery SOC etc are all supplied by the battery. Essentially the MNGP2 listens for the SOC for example and if it recieves it from a battery it is a higher priority and thus over writes the WBjr

[mahendra]

Great that answers so much

[aaapilot]

Here is the pinout for the Midnite battery ( from the manual) and the pinout of the Hawkes Bay, Barcelona , Rosie jacks
Also showing pinout from my Pace BMS batteries. So for my batteries the Canbus wires match up so a regular Cat 5 cable should work. But since the Midnite documents say to leave the other wires floating ( disconnected ) and I am not 100% sure there are no other connections on the other pins on my Pace BMS Canbus jack - I will clip all the other wires than the two Canbus on on 4 and 5 ,and fro the ground then I will have to connect pin 8 from Midnite controller to pin 7 of the Pace BMS  .

Larry, reference the Pin numbering in the MN document & your Pace BMS doc.  The Pace BMS shows 'standard' numbering for the Pins, i.e. the push tab on the bottom and pin #1 on the left looking at the small pic at the top left corner.  The MN document shows a pic w/the push tab on top and Pin #1 on the left. These are DIFFERENT.   About to make a cable for the Rosie to Pytes battery (which agrees w/your Pace BMS by the way), but the CanBUS H/L would be reversed on each end of the cable if I followed both of these diagrams ....  .  Am I reading these correctly?  Is MN using non-standard numbering for their pins?  Have you made a cable to use your HB w/the Pace BMS and does it work?  I checked all the Rosie/HB/Barcellona docs for a CanBUS pin layout and they are not shown.  Maybe I'm just messed up, but scratching my head.  Thanks!


Dave

[ClassicCrazy]

No I haven't gotten the new firmware installed or cable made up . Might get that done tonight.
I will look again at the pinouts to see what you noticed.
Larry

[ClassicCrazy]

Looks like you can verify Can Hi as above 2.5v and Can Lo will be below 2.5v
https://support.enovationcontrols.com/hc/en-us/articles/360038856494-CAN-BUS-Troubleshooting-Guide-with-Video

[aaapilot]

Looks like you can verify Can Hi as above 2.5v and Can Lo will be below 2.5v
https://support.enovationcontrols.com/hc/en-us/articles/360038856494-CAN-BUS-Troubleshooting-Guide-with-Video

Thanks Larry.  I made up the MN side of the cable tonight.  I'll check voltage tomorrow before I put a termination on the battery side of the cable.  Thanks for the article

Dave

[mahendra]

 I made up the MN side of the cable tonight.  I'll check voltage tomorrow before I put a termination on the battery side of the cable.  Thanks for the article

Dave
[/quote]

Let Us know how it goes, Dave.

[mahendra]

I will try this around January or after the holidays with four EG4 life power batteries as soon as I swap the jk BMS to its original BMS, update the firmware, and deliver the EG4 battery HUB.
I also have to figure out the ground pin of the EG4 hub CAN port.

[mahendra]

Is this Type A or Type B .

As this would help in determining the correct ground pin for batteries .

Got EG 4 Pins here:
https://diysolarforum.com/threads/using-eg4-communications-hub-with-victron.75963/post-967045

[aaapilot]

Is this Type A or Type B .

As this would help in determining the correct ground pin for batteries .

Got EG 4 Pins here:
https://diysolarforum.com/threads/using-eg4-communications-hub-with-victron.75963/post-967045

I don't think Type A or B would be applicable here, since you are not using all 8 wires.  You are building a cable with 2 or 3 wires (if you do the ground), so the only important issue is to get those on the correct pins.  That's what generated my earlier question as to orientation of the plug (tab up or down) so I could get the 4 & 5 pin, High & Low, to the correct place on the battery and inverter.

So ... I made a patch cable using Cat6 shielded cable w/metal ends, so it MAY be grounded thru the cable shielding.  I say MAY, because I don't know if the RG45 connector on the Rosie motherboard and the battery RG45 are each connected to ground.  They each have a PIN that is grounded, but the connector itself? FNG said the ground isn't needed in the cable, so shouldn't make a difference anyway.  The cable ends have the 4/5 pins swapped on each end per the diagrams that Classic Crazy posted.  I did plug it in to Rosie before I terminated the battery end and verified which wire had the higher voltage, then made that the battery pin 4 High, which actually agreed w/the diagrams!   I just need to upload the latest MNGP2 & Rosie software and we'll see what happens :|

Dave