[Ovmsdev] Volt/Ampera

[mikeljo at me.com]

Hi,

Johannes find some interesting stuff:

send:  7E4      8 06 2C FE 43 69 43 68 00
return: 7EC      8 02 6C FE AA AA AA AA AA
Set Configuration to get Voltage and Current

send: 7E4      8 03 AA 04 FE 00 00 00 00
return: 5EC      8 FE 4A 6F 00 00 00 00 00 [repeat 160 times]

Byte 1 (4A) Current
Byte 2 (6F) Voltage
Calculation:
I = Byte 1 * 0.2 in Ampere
U = Byte 2 / 2 in Volt

And continue:

Sending this two sequenzes immediately 
7E4      8 10 08 2C FE 43 69 43 68
7E4      8 21 80 1F 00 00 00 00 00

gives with this:
send:  7E4      8 03 AA 04 FE 00 00 00 00
return: 5EC      8 FE 4A 6F 64 00 00 00 00  [repeat 160 times]

Byte 1 and 2 same as before, and in Byte 3 Temperature in °C
T = (Byte 3 / 2 ) - 40
This is the Temp. in raw. in Byte 4 could be Temp filtered. Still searching the Sequence for this.


Strom: 0x4A * 0,2 = 14,8A
Spannung: 0x6F * 2 = 222V
Temperatur: (0x64 / 2) - 40 = 10°C

Current and Temperature are ok. I think the Voltage must have an Offset (8 or 9) too. Cause my Voltage is around 230V.

It seems that the config send only once (every x Minutes, or so) and the "give me data" ID (7E4 8 03 AA 04 FE 00 00 00 00) every time you want to get it.
Then you get ~160 times the requested Values in ID 5EC.

Idea:
car is off. -> no data on can bus.
car is off and charging -> can bus wakes every ~30 MInutes up. You can see in my Logs.
When the can bus is awake (it gets valid SOC Data for example), the Module send the initialization sequence and then the demand sequence.
It can send the demand sequence every 10seconds until the the can bus go sleep.
When there are no valid values in 5EC (the rest is valid) (temperature is zero, we normally don't have -40°C), the module sends the initialization sequnece again.

Bye
Michael J.


Am 28.12.2012 um 01:41 schrieb Mark Webb-Johnson <mark at webb-johnson.net>:

> 
> Can he provide the logs from the moment the DashDAQ is connected? Perhaps 10 seconds without charging, then start the charge and continue to monitor for 1 minute.
> 
> It seems possible that this is enabled by turning on a monitoring mode, but unexpected. This sort of thing would normally just be transmitted as part of the normal message stream.
> 
> Regards, Mark
> 
> On 27 Dec, 2012, at 11:58 PM, mikeljo at me.com wrote:
> 
>> Am 27.12.2012 um 01:11 schrieb Mark Webb-Johnson <mark at webb-johnson.net>:
>> 
>>> Now, on to the other messages (I spoke about yesterday in the other thread). I'll try to drum up some interest in the forums to see if anyone can help with the decodes. It would be good if you could do the same.
>> 
>> And here some first results from tachy:
>> 
>> CANUSB mit DashDAQ kombiniert bringts! Ich habe soeben den Code für das Ladegerät (Ladestrom/Ladespannung) rausbekommen:
>> 
>> 5EC Byte 3 Ladestrom Einheit 0.2 A (Bsp: 14.2 A = 47h)
>> 5EC Byte 4 Ladespannung Einheit 2 V (Bsp: 222V = 6Fh)
>> 
>> 
>> He works with a DashDAQ and a CANUSB, both connected with a ODB2 Y-Cable.
>> So he find the Charging Current und Charging Voltage:
>> 5EC Byte 3 Charge Current Unit 0.2 A (Example: 14.2 A = 47h)
>> 5EC Byte 4 Charge Voltage Unit 2 V (Example: 222V = 6Fh)
>> 
>> Fast enough?
>> 
>> BUT!!! This IDs doesn't exist in my Logs. i Think the DasDaq send a Command to get this ID.
>> 
>> 
>> Bye
>> michael
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> 
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