Ecumaster forum

Hello,
I am doing PMU CAN communication setting with M1 Motec. I found information on M1 CAN stream to PDM from its help file. Is this can be used or should use ADU to Motec M1 CAN stream.
I also want to transmit PMU's I/O status
Appreciate your help

Hi,
What kind of information do you want to send from PMU to M1 exactly?
Analog state or analog voltage?
Output state or output current/voltage?

The Motec PDM CAN stream is available in the document called "Motec PDM User Manual.pdf".
The stream needs to be emulated.

http://www.precisionautoresearch.com/ec ... l%20A5.pdf

jgm wrote: ↑

Mon Jan 28, 2019 7:53 pm

Hi,
What kind of information do you want to send from PMU to M1 exactly?
Analog state or analog voltage?
Output state or output current/voltage?

I want to send the followings
to AIM MXG
- Analog voltage and state
- Keyboard state
- Output voltage
to M1
fuel pump fault
radiator fan output

Attached is setting for receive from M1 please correct me if wrong
Thank you

Hi,
I've added export of these fuelPump and radiatorFan outputs status to M1.
The meaning of the status in Ecumaster PMU is as follows:
0 - off
1 - on
2 - undercurrent
3 - overcurrent
7 - thermalShutdown

In the Motec PDM the meaning of the status is as follows:
0 - off
1 - on
2 - overcurrent
4 - fault (similar to PMU's thermalShutdown)

I'm using for each output the following formula:
errorCode=lookup3(pmu_o_status-2, [0,2,4])
pdm_status = choose(pmu_o_active, 1, errorCode)

Exporting is done to BaseID+4 (0x504)

(continued)

Two frames need to be sent with different CompoundIndex (bit shift is 6)
- CompoundIndex=0: value 0 at byte0 (it's 0<<6 in C notation)
- CompoundIndex=1: value 64 (0x40) at byte0 (it's 1<<6 in C notation)

For AIM MXG I recommend to enable PMU Standard Stream at 0x668 and read it directly in the AIM MXG.

Thank you very much. I will test and learn it

Hello,
I test the setting you gave on bench it was so fun . Emulate the PMU's output and M1 will detect when fuel pump or fan fault.
Also to receive message from M1 (to 'PDM') I set the ID 0x118 on PMU, it was quite straight forward

question
1. in CANBus export "x_PDMtoM1_ID+4_CI=1", can you explain meaning of value 64 in channel 0
2. Please check the setting ID 0x119 in PMU CANbus Inputs

FIS wrote: ↑

Sun Feb 03, 2019 3:51 pm

Hello,
I test the setting you gave on bench it was so fun . Emulate the PMU's output and M1 will detect when fuel pump or fan fault.
Also to receive message from M1 (to 'PDM') I set the ID 0x118 on PMU, it was quite straight forward

question
1. in CANBus export "x_PDMtoM1_ID+4_CI=1", can you explain meaning of value 64 in channel 0
2. Please check the setting ID 0x119 in PMU CANbus Inputs

Done by importing the Motec CANX file

FIS wrote: ↑

Sun Feb 03, 2019 3:51 pm

question
1. in CANBus export "x_PDMtoM1_ID+4_CI=1", can you explain meaning of value 64 in channel 0

This Motec stream is 2bit Compound CAN stream. It means that 2 most significant bits (0x80 and 0x40) of the Byte0 are used to identify what the sub-frame index is. 64 means the CompundID=1, like on the screenshot from the Motec documentation I've posted. It's 1 << 6 in C notation (<< denote ShiftLeft operator).