So I just reopened the SS BMS software, left B1 set a position 2, and B2 set at position 3, forced a new search, and the BMS SW found BOTH batteries - one on Com 5, and one on Com 7. However, I have no idea which is which, because the only Serial number of each is apparently the same build date. Anyway, I am now reopening SA and will see what happens. Thanks
Hello Tom,
Long reply ahead, but I hope it helps you or some future readers.
I read through this whole thread this morning, and want to make sure of something. If the BMS software is finding the batteries at COM5 and COM7, then SA will not find the second battery. The BMS software will allow a skip in the sequencing, but SA will not. As soon as SA encounters a gap in the line, it stop searching. for example, I can take my two racks of six batteries each, which are set as 2 through 13, and if I turn off any battery then nothing after that battery will be seen by SA, naturally including the one that's turned off.
Before I proceed, it should be noted that I am basing it off of the current version of the EG4 LL v1 manual listed online. I am assuming you may actually have v1 batteries, because the v2 battery manual shows that they have a six way DIP switch, and you note only four DIP switches on your batteries in your post #5 above.
Assuming you do have v1 batteries, then the DIP switches are configured right to left according to the manual, which very poorly only shows you the example of what the ID 1 setting is, which is only the far right switch in the up position. That said, we can still deduce what all other positions should be.
When you are setting your DIP switches, you noted in post #5 above that down-down-down-down is ID 0. if that is the case, then ID 2 would be down-down-up-down. and ID 3 would be down-down-up-up.
Please bear in mind that I don't know your experience setting DIP switches, but I just thought it was odd that the BMS software is skipping COM6 when addressing your two batteries successfully. based upon it seeing COM5 and COM7, it feels like the DIP setting on the first battery for ID 2 is down-down-up-down and the second battery to down-up-down-down, which is ID 4, not ID 3, as I noted above, which would be down-down-up-up.
To word this another way if someone comes along that is not familiar with DIP switch assignment, the DIP switches work in an additive manner. the left most DIP switch on this battery has a value of 8 when in the on position, the next DIP switch to the right has a value of 4, the next has a value of 2, and the far right one has a value of 1. you flip on whatever combination of those that when you add up those values, you get the battery ID you want. so in the case of the EG4 settings, ID 1 is only the right switch in the on position, while battery ID 2 is only the second most right DIP switch in the on position, which is a value of two. but if you need the battery to ID as 3, you have to flip both of the right most DIP switches to the on position, which gives you a value of 0+0+2+1, or a total of 3.
In summary, the switches are the equivalent of 8+4+2+1 when they are in the on position, respectively, but if any switch is in the off position, it's the equivalent value of zero. This allows four DIP switches to set IDs on up to 16 batteries, with ID 0 being the first (0+0+0+0), and ID 15 being the last (8+4+2+1)
For reference the standard EG4 batteries (not the LL models) have their DIP switches go from left to right, as in they add up as 1+2+4+8. There have been some folks that have reported the DIP switches being soldered in backwards or upside down, so that the actual DIP switch labeling itself of on and off and 1-4 are even backwards, so it can be a hot mess.
Happy ID'ing!