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Author Topic: Power Limiter on Zero FXS Question  (Read 123 times)

BamBam

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Power Limiter on Zero FXS Question
« on: October 31, 2017, 11:28:24 PM »

I noticed that on my FXS the power is reduced when the battery is below a certain charge.  Is this normal and if so can someone explain what the parameters are?  Do all of the Zero models operate this way?  Is there any way to override the power limitation.

PS - Moderators feel free to move this thread.  Probably should be in Zero 2013+ forum.
« Last Edit: November 01, 2017, 12:04:03 AM by BamBam »
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gt13013

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Re: Power Limiter on Zero FXS Question
« Reply #1 on: November 01, 2017, 03:38:45 PM »

When limitation applies, it is recorded inside the log that your bike stores.

You can get the logs by sending them to you by email using the Zero Application (I use the Android version)
https://zeromanual.com/index.php/Official_Mobile_Application#Obtaining_Logs

Then you can decode and read the logs using the "Zero Log File Parser" that you can get here
https://zero-motorcycle-community.github.io/browser-parse/

It will give you a text file in which you can search for the string "Batt Dischg Cur Limited", that shows when this limitation occurs. You can then try to correlate this limitation versus the SOC, temperatures, power that you try to get from the bike, etc... and make a little bit of reverse engineering to try to understand when the limitation arises ;)
Example taken in my log file:
Code: [Select]
06512     10/21/2017 19:46:34   Riding                     PackTemp: h 24C, l 23C, PackSOC: 69%, Vpack:105.537V, MotAmps:  56, BattAmps:  11, Mods: 11, MotTemp:  32C, CtrlTemp:  20C, AmbTemp:  19C, MotRPM: 663, Odo: 4037km
 06513     10/21/2017 19:47:34   Riding                     PackTemp: h 24C, l 23C, PackSOC: 68%, Vpack:101.461V, MotAmps: 355, BattAmps: 126, Mods: 11, MotTemp:  34C, CtrlTemp:  20C, AmbTemp:  19C, MotRPM: 962, Odo: 4037km
 06514     10/21/2017 19:48:34   Riding                     PackTemp: h 24C, l 23C, PackSOC: 68%, Vpack:103.789V, MotAmps:  37, BattAmps:  31, Mods: 11, MotTemp:  38C, CtrlTemp:  21C, AmbTemp:  19C, MotRPM:2934, Odo: 4038km
 06515     10/21/2017 19:49:34   Riding                     PackTemp: h 24C, l 23C, PackSOC: 66%, Vpack:102.915V, MotAmps:  31, BattAmps:  32, Mods: 11, MotTemp:  38C, CtrlTemp:  22C, AmbTemp:  20C, MotRPM:3584, Odo: 4040km
 06516     10/21/2017 19:50:34   Riding                     PackTemp: h 24C, l 23C, PackSOC: 66%, Vpack:104.982V, MotAmps: -18, BattAmps: -12, Mods: 11, MotTemp:  40C, CtrlTemp:  22C, AmbTemp:  20C, MotRPM:2781, Odo: 4041km
 06517     10/21/2017 19:51:34   Riding                     PackTemp: h 24C, l 23C, PackSOC: 64%, Vpack:103.589V, MotAmps: -15, BattAmps: -12, Mods: 11, MotTemp:  43C, CtrlTemp:  23C, AmbTemp:  20C, MotRPM:3675, Odo: 4042km
 06518     10/21/2017 19:51:34   Batt Dischg Cur Limited    477 A (91%), MinCell: 3692mV, MaxPackTemp: 24C
 06519     10/21/2017 19:52:34   Riding                     PackTemp: h 24C, l 23C, PackSOC: 63%, Vpack:104.112V, MotAmps: -18, BattAmps:  -9, Mods: 11, MotTemp:  43C, CtrlTemp:  22C, AmbTemp:  20C, MotRPM:2321, Odo: 4043km
 06520     10/21/2017 19:53:34   Riding                     PackTemp: h 24C, l 23C, PackSOC: 63%, Vpack:102.664V, MotAmps:  24, BattAmps:  22, Mods: 11, MotTemp:  44C, CtrlTemp:  22C, AmbTemp:  20C, MotRPM:3000, Odo: 4044km
 06521     10/21/2017 19:53:34   Batt Dischg Cur Limited    494 A (95%), MinCell: 3658mV, MaxPackTemp: 24C
 06522     10/21/2017 19:54:34   Riding                     PackTemp: h 24C, l 23C, PackSOC: 62%, Vpack:100.634V, MotAmps:  81, BattAmps:  74, Mods: 11, MotTemp:  44C, CtrlTemp:  23C, AmbTemp:  20C, MotRPM:3017, Odo: 4045km
 06523     10/21/2017 19:54:34   Batt Dischg Cur Limited    504 A (96%), MinCell: 3582mV, MaxPackTemp: 24C
 06524     10/21/2017 19:55:34   Riding                     PackTemp: h 24C, l 23C, PackSOC: 60%, Vpack:103.117V, MotAmps: -18, BattAmps:  -9, Mods: 11, MotTemp:  46C, CtrlTemp:  23C, AmbTemp:  19C, MotRPM:2254, Odo: 4046km
 06525     10/21/2017 19:55:34   Batt Dischg Cur Limited    461 A (88%), MinCell: 3678mV, MaxPackTemp: 24C
 06526     10/21/2017 19:56:34   Riding                     PackTemp: h 24C, l 23C, PackSOC: 59%, Vpack:101.428V, MotAmps:  50, BattAmps:  38, Mods: 11, MotTemp:  46C, CtrlTemp:  23C, AmbTemp:  19C, MotRPM:2424, Odo: 4047km
 06527     10/21/2017 19:56:34   Batt Dischg Cur Limited    476 A (91%), MinCell: 3612mV, MaxPackTemp: 24C
 06528     10/21/2017 19:57:34   Riding                     PackTemp: h 25C, l 24C, PackSOC: 58%, Vpack: 98.442V, MotAmps:  92, BattAmps:  98, Mods: 11, MotTemp:  46C, CtrlTemp:  23C, AmbTemp:  19C, MotRPM:3452, Odo: 4048km
 06529     10/21/2017 19:57:34   Batt Dischg Cur Limited    438 A (84%), MinCell: 3500mV, MaxPackTemp: 25C
 06530     10/21/2017 19:58:34   Riding                     PackTemp: h 25C, l 24C, PackSOC: 56%, Vpack:100.075V, MotAmps:  56, BattAmps:  54, Mods: 11, MotTemp:  48C, CtrlTemp:  23C, AmbTemp:  19C, MotRPM:3185, Odo: 4049km
 06531     10/21/2017 19:58:34   Batt Dischg Cur Limited    438 A (84%), MinCell: 3563mV, MaxPackTemp: 25C
 06532     10/21/2017 19:59:34   Riding                     PackTemp: h 25C, l 24C, PackSOC: 54%, Vpack: 99.758V, MotAmps:  60, BattAmps:  53, Mods: 11, MotTemp:  49C, CtrlTemp:  23C, AmbTemp:  18C, MotRPM:2663, Odo: 4050km
 06533     10/21/2017 19:59:34   Batt Dischg Cur Limited    403 A (77%), MinCell: 3561mV, MaxPackTemp: 25C
 06534     10/21/2017 20:00:34   Riding                     PackTemp: h 25C, l 24C, PackSOC: 53%, Vpack:100.118V, MotAmps:  44, BattAmps:  42, Mods: 11, MotTemp:  49C, CtrlTemp:  22C, AmbTemp:  18C, MotRPM:3137, Odo: 4051km
 06535     10/21/2017 20:00:34   Batt Dischg Cur Limited    425 A (81%), MinCell: 3562mV, MaxPackTemp: 25C
 06536     10/21/2017 20:01:34   Riding                     PackTemp: h 25C, l 24C, PackSOC: 53%, Vpack:100.853V, MotAmps:  70, BattAmps:  38, Mods: 11, MotTemp:  48C, CtrlTemp:  22C, AmbTemp:  19C, MotRPM:1607, Odo: 4052km
 06537     10/21/2017 20:01:34   Batt Dischg Cur Limited    449 A (86%), MinCell: 3599mV, MaxPackTemp: 25C
 06538     10/21/2017 20:02:34   Riding                     PackTemp: h 25C, l 24C, PackSOC: 53%, Vpack: 101.16V, MotAmps:  43, BattAmps:  26, Mods: 11, MotTemp:  48C, CtrlTemp:  22C, AmbTemp:  19C, MotRPM:2030, Odo: 4053km
 06539     10/21/2017 20:02:34   Batt Dischg Cur Limited    450 A (86%), MinCell: 3605mV, MaxPackTemp: 25C
 06540     10/21/2017 20:03:34   Riding                     PackTemp: h 25C, l 24C, PackSOC: 52%, Vpack:102.411V, MotAmps: -18, BattAmps:  -6, Mods: 11, MotTemp:  47C, CtrlTemp:  22C, AmbTemp:  19C, MotRPM:1938, Odo: 4053km
 06541     10/21/2017 20:03:34   Batt Dischg Cur Limited    449 A (86%), MinCell: 3654mV, MaxPackTemp: 25C
 06542     10/21/2017 20:04:34   Riding                     PackTemp: h 25C, l 24C, PackSOC: 51%, Vpack:100.907V, MotAmps:  15, BattAmps:  15, Mods: 11, MotTemp:  48C, CtrlTemp:  23C, AmbTemp:  19C, MotRPM:3047, Odo: 4054km
 06543     10/21/2017 20:04:34   Batt Dischg Cur Limited    420 A (80%), MinCell: 3598mV, MaxPackTemp: 25C
 06544     10/21/2017 20:05:34   Riding                     PackTemp: h 25C, l 24C, PackSOC: 50%, Vpack: 99.618V, MotAmps:  40, BattAmps:  46, Mods: 11, MotTemp:  47C, CtrlTemp:  22C, AmbTemp:  19C, MotRPM:3709, Odo: 4055km
 06545     10/21/2017 20:05:34   Batt Dischg Cur Limited    412 A (79%), MinCell: 3544mV, MaxPackTemp: 25C
 06546     10/21/2017 20:06:34   Riding                     PackTemp: h 25C, l 24C, PackSOC: 49%, Vpack:101.941V, MotAmps: -18, BattAmps: -12, Mods: 11, MotTemp:  47C, CtrlTemp:  22C, AmbTemp:  19C, MotRPM:2739, Odo: 4056km
 06547     10/21/2017 20:06:34   Batt Dischg Cur Limited    430 A (82%), MinCell: 3577mV, MaxPackTemp: 25C
 06548     10/21/2017 20:07:34   Riding                     PackTemp: h 25C, l 24C, PackSOC: 49%, Vpack:100.864V, MotAmps:  63, BattAmps:  21, Mods: 11, MotTemp:  48C, CtrlTemp:  22C, AmbTemp:  19C, MotRPM: 999, Odo: 4057km
 06549     10/21/2017 20:07:34   Batt Dischg Cur Limited    429 A (82%), MinCell: 3587mV, MaxPackTemp: 25C
 06550     10/21/2017 20:08:34   Riding                     PackTemp: h 25C, l 24C, PackSOC: 49%, Vpack:101.921V, MotAmps:   0, BattAmps:   0, Mods: 11, MotTemp:  49C, CtrlTemp:  22C, AmbTemp:  19C, MotRPM:   0, Odo: 4058km
 06551     10/21/2017 20:08:34   Batt Dischg Cur Limited    446 A (85%), MinCell: 3636mV, MaxPackTemp: 25C
 06552     10/21/2017 20:09:34   Riding                     PackTemp: h 25C, l 24C, PackSOC: 49%, Vpack:101.773V, MotAmps:  65, BattAmps:   6, Mods: 11, MotTemp:  50C, CtrlTemp:  23C, AmbTemp:  19C, MotRPM: 173, Odo: 4058km
 06553     10/21/2017 20:09:34   Batt Dischg Cur Limited    447 A (85%), MinCell: 3634mV, MaxPackTemp: 25C
 06554     10/21/2017 20:10:34   Riding                     PackTemp: h 25C, l 24C, PackSOC: 49%, Vpack:101.982V, MotAmps:   0, BattAmps:   2, Mods: 11, MotTemp:  49C, CtrlTemp:  22C, AmbTemp:  19C, MotRPM:   0, Odo: 4058km
 06555     10/21/2017 20:10:34   Batt Dischg Cur Limited    451 A (86%), MinCell: 3638mV, MaxPackTemp: 25C
 06556     10/21/2017 20:11:34   Riding                     PackTemp: h 25C, l 24C, PackSOC: 48%, Vpack:101.582V, MotAmps:  28, BattAmps:  10, Mods: 11, MotTemp:  47C, CtrlTemp:  23C, AmbTemp:  19C, MotRPM:1096, Odo: 4058km
 06557     10/21/2017 20:11:34   Batt Dischg Cur Limited    450 A (86%), MinCell: 3607mV, MaxPackTemp: 25C
 06558     10/21/2017 20:12:34   Riding                     PackTemp: h 25C, l 24C, PackSOC: 48%, Vpack:101.555V, MotAmps:  10, BattAmps:   7, Mods: 11, MotTemp:  46C, CtrlTemp:  23C, AmbTemp:  19C, MotRPM:1577, Odo: 4059km
 06559     10/21/2017 20:12:34   Batt Dischg Cur Limited    443 A (85%), MinCell: 3619mV, MaxPackTemp: 25C
 06560     10/21/2017 20:13:34   Riding                     PackTemp: h 25C, l 24C, PackSOC: 48%, Vpack: 99.107V, MotAmps: 104, BattAmps:  72, Mods: 11, MotTemp:  47C, CtrlTemp:  24C, AmbTemp:  19C, MotRPM:2200, Odo: 4059km
 06561     10/21/2017 20:13:34   Batt Dischg Cur Limited    432 A (83%), MinCell: 3533mV, MaxPackTemp: 25C
 06562     10/21/2017 20:14:34   Riding                     PackTemp: h 25C, l 24C, PackSOC: 47%, Vpack:101.138V, MotAmps:  24, BattAmps:  15, Mods: 11, MotTemp:  47C, CtrlTemp:  24C, AmbTemp:  19C, MotRPM:1907, Odo: 4060km
 06563     10/21/2017 20:14:34   Batt Dischg Cur Limited    437 A (84%), MinCell: 3605mV, MaxPackTemp: 25C
 06564     10/21/2017 20:15:34   Riding                     PackTemp: h 25C, l 24C, PackSOC: 47%, Vpack:101.014V, MotAmps:  15, BattAmps:   9, Mods: 11, MotTemp:  47C, CtrlTemp:  24C, AmbTemp:  20C, MotRPM:1478, Odo: 4061km
 06565     10/21/2017 20:15:34   Batt Dischg Cur Limited    419 A (80%), MinCell: 3587mV, MaxPackTemp: 25C
 06566     10/21/2017 20:16:34   Riding                     PackTemp: h 25C, l 24C, PackSOC: 46%, Vpack:101.012V, MotAmps:  26, BattAmps:  17, Mods: 11, MotTemp:  47C, CtrlTemp:  24C, AmbTemp:  20C, MotRPM:2047, Odo: 4061km
 06567     10/21/2017 20:16:34   Batt Dischg Cur Limited    431 A (82%), MinCell: 3603mV, MaxPackTemp: 25C
 06568     10/21/2017 20:17:34   Riding                     PackTemp: h 25C, l 24C, PackSOC: 46%, Vpack:101.824V, MotAmps: -27, BattAmps: -15, Mods: 11, MotTemp:  50C, CtrlTemp:  24C, AmbTemp:  20C, MotRPM:2301, Odo: 4062km
 06569     10/21/2017 20:17:34   Batt Dischg Cur Limited    409 A (78%), MinCell: 3625mV, MaxPackTemp: 25C
 06570     10/21/2017 20:18:34   Riding                     PackTemp: h 25C, l 24C, PackSOC: 45%, Vpack:101.709V, MotAmps: -27, BattAmps: -15, Mods: 11, MotTemp:  50C, CtrlTemp:  24C, AmbTemp:  20C, MotRPM:2302, Odo: 4063km
 06571     10/21/2017 20:18:34   Batt Dischg Cur Limited    407 A (78%), MinCell: 3625mV, MaxPackTemp: 25C
 06572     10/21/2017 20:19:34   Riding                     PackTemp: h 25C, l 24C, PackSOC: 45%, Vpack:101.037V, MotAmps:   0, BattAmps:   1, Mods: 11, MotTemp:  52C, CtrlTemp:  25C, AmbTemp:  20C, MotRPM: 482, Odo: 4064km
 06573     10/21/2017 20:19:34   Batt Dischg Cur Limited    399 A (76%), MinCell: 3604mV, MaxPackTemp: 25C
 06574     10/21/2017 20:20:34   Riding                     PackTemp: h 25C, l 24C, PackSOC: 44%, Vpack:100.976V, MotAmps:   0, BattAmps:   1, Mods: 11, MotTemp:  52C, CtrlTemp:  25C, AmbTemp:  20C, MotRPM: 376, Odo: 4064km
 06575     10/21/2017 20:20:34   Batt Dischg Cur Limited    401 A (77%), MinCell: 3602mV, MaxPackTemp: 25C
 06576     10/21/2017 20:21:34   Riding                     PackTemp: h 25C, l 24C, PackSOC: 43%, Vpack: 99.871V, MotAmps:  57, BattAmps:  32, Mods: 11, MotTemp:  50C, CtrlTemp:  24C, AmbTemp:  20C, MotRPM:1828, Odo: 4065km
 06577     10/21/2017 20:21:34   Batt Dischg Cur Limited    407 A (78%), MinCell: 3538mV, MaxPackTemp: 25C
 06578     10/21/2017 20:22:34   Riding                     PackTemp: h 25C, l 24C, PackSOC: 43%, Vpack:100.632V, MotAmps:  17, BattAmps:   9, Mods: 11, MotTemp:  50C, CtrlTemp:  25C, AmbTemp:  20C, MotRPM:1599, Odo: 4066km
 06579     10/21/2017 20:22:34   Batt Dischg Cur Limited    402 A (77%), MinCell: 3588mV, MaxPackTemp: 25C
 06580     10/21/2017 20:23:34   Riding                     PackTemp: h 25C, l 24C, PackSOC: 42%, Vpack:100.864V, MotAmps:   0, BattAmps:   0, Mods: 11, MotTemp:  54C, CtrlTemp:  25C, AmbTemp:  20C, MotRPM:   0, Odo: 4066km
 06581     10/21/2017 20:23:34   Batt Dischg Cur Limited    399 A (76%), MinCell: 3598mV, MaxPackTemp: 25C
 06582     10/21/2017 20:24:34   Riding                     PackTemp: h 25C, l 24C, PackSOC: 42%, Vpack: 99.027V, MotAmps:  51, BattAmps:  39, Mods: 11, MotTemp:  51C, CtrlTemp:  25C, AmbTemp:  20C, MotRPM:2492, Odo: 4067km
 06583     10/21/2017 20:24:34   Batt Dischg Cur Limited    383 A (73%), MinCell: 3524mV, MaxPackTemp: 25C
 06584     10/21/2017 20:25:34   Riding                     PackTemp: h 26C, l 24C, PackSOC: 41%, Vpack:100.334V, MotAmps:  22, BattAmps:  13, Mods: 11, MotTemp:  51C, CtrlTemp:  25C, AmbTemp:  20C, MotRPM:1727, Odo: 4067km
 06585     10/21/2017 20:25:34   Batt Dischg Cur Limited    398 A (76%), MinCell: 3578mV, MaxPackTemp: 26C
 06586     10/21/2017 20:26:34   Riding                     PackTemp: h 26C, l 24C, PackSOC: 41%, Vpack: 99.898V, MotAmps:  41, BattAmps:  24, Mods: 11, MotTemp:  48C, CtrlTemp:  24C, AmbTemp:  20C, MotRPM:1921, Odo: 4068km
 06587     10/21/2017 20:26:34   Batt Dischg Cur Limited    400 A (76%), MinCell: 3562mV, MaxPackTemp: 26C
 06588     10/21/2017 20:27:34   Riding                     PackTemp: h 26C, l 24C, PackSOC: 40%, Vpack:101.053V, MotAmps: -18, BattAmps:  -4, Mods: 11, MotTemp:  48C, CtrlTemp:  24C, AmbTemp:  20C, MotRPM:1634, Odo: 4068km
 06589     10/21/2017 20:27:34   Batt Dischg Cur Limited    405 A (77%), MinCell: 3603mV, MaxPackTemp: 26C
 06590     10/21/2017 20:28:34   Riding                     PackTemp: h 26C, l 24C, PackSOC: 40%, Vpack: 98.906V, MotAmps:  61, BattAmps:  50, Mods: 11, MotTemp:  51C, CtrlTemp:  26C, AmbTemp:  20C, MotRPM:2751, Odo: 4069km
 06591     10/21/2017 20:28:34   Batt Dischg Cur Limited    386 A (74%), MinCell: 3531mV, MaxPackTemp: 26C
 06592     10/21/2017 20:29:34   Riding                     PackTemp: h 26C, l 24C, PackSOC: 39%, Vpack: 96.751V, MotAmps:  97, BattAmps: 101, Mods: 11, MotTemp:  49C, CtrlTemp:  25C, AmbTemp:  20C, MotRPM:3304, Odo: 4070km
 06593     10/21/2017 20:29:34   Batt Dischg Cur Limited    377 A (72%), MinCell: 3439mV, MaxPackTemp: 26C
 06594     10/21/2017 20:30:34   Riding                     PackTemp: h 26C, l 24C, PackSOC: 39%, Vpack: 98.624V, MotAmps:  98, BattAmps:  54, Mods: 11, MotTemp:  50C, CtrlTemp:  25C, AmbTemp:  20C, MotRPM:1807, Odo: 4070km
 06595     10/21/2017 20:30:34   Batt Dischg Cur Limited    386 A (74%), MinCell: 3514mV, MaxPackTemp: 26C
 06596     10/21/2017 20:31:34   Riding                     PackTemp: h 26C, l 24C, PackSOC: 38%, Vpack: 98.534V, MotAmps:  90, BattAmps:  63, Mods: 11, MotTemp:  51C, CtrlTemp:  25C, AmbTemp:  20C, MotRPM:2156, Odo: 4071km
 06597     10/21/2017 20:31:34   Batt Dischg Cur Limited    388 A (74%), MinCell: 3513mV, MaxPackTemp: 26C

Another way to simply check when the limitation applies is to use the "Zero Log Viewer". It will draw 5 different kinds of curves. In the 4th one, when the limitation applies, the "minCell" in flashy green will appear. In the 2d one, I can see the strong correlation with the SOC. In my case, the limitation seems to appear when the SOC becomes lower than 64%. I must say that I did not notice any loss of power during the ride. The max current decreases when the SOC decreases. In that case, I finished the ride with a SOC of 38% and I had a current limitation around 380 Amperes, which is pretty enough to ride in good conditions (perhaps not for racing, but it is not my purpose  ;) ). I attach two plots illustrating this. They are those in relation with the log just above.
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gt13013

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Re: Power Limiter on Zero FXS Question
« Reply #2 on: November 01, 2017, 03:45:50 PM »

I realize just now that in the 4th graph there is also the indication "Limit Amps", but it is difficult to notice.
It can be seen on the left part of the graph (a small blue dot inside the graph), but not on the right hand side of the graph. OK, I can see it when zooming inside the graph...

In fact, I first noticed these green minCell curves in the Log Viewer, I tried to see in the log where did they come from, and I noticed the correlation with the Amp limitation.
But I do not really understand what exactly this minCell warning tells us !
If somebody can explain better...
« Last Edit: November 01, 2017, 03:56:37 PM by gt13013 »
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BamBam

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Re: Power Limiter on Zero FXS Question
« Reply #3 on: November 01, 2017, 07:11:21 PM »

Awesome, thanks very much for the great explanation.  I noticed the power reduction when I happened to be on a small stretch of highway going up a fairly steep grade.  I was doing around 60 mph and I pegged the throttle for more power but nothing happened.  It appeared to be maxed out.  I was in sport mode.  I think my SOC was in upper 30% range.  If I was riding on a typical street I probably wouldn't have noticed the reduction.  The limitation kicking in at 64% seems rather extreme to me.  I assume there is no work around for that.
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gt13013

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Re: Power Limiter on Zero FXS Question
« Reply #4 on: November 01, 2017, 07:22:38 PM »

I also think that there is no way to modify these limitations.
I assume they have been put in place in order to prevent damages on the batteries.
I prefer to have a slightly limited power and keep my batteries for a long time  ;)

By the way, I still have an old firmware (47) while the up to date firmware for my bike is the 51.
Different firmwares could have different programming for this limitation...

The logs are stored for some time in your bike. If you have not made too much distance, the log of this ride is perhaps still in the bike. In this case, you could retrieve it and see exactly what happened.
« Last Edit: November 02, 2017, 01:56:21 PM by gt13013 »
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Zero FXS 2016
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