Lars200 Posted January 27, 2023 Report Share Posted January 27, 2023 Do any one got tips about can bus on the pdm? Want to use my Aim MXL2 to send can bus signal with rpm and speed. The aim has a can bus 2 that i program my self. Like some of the information that MICRO PDM has in the user manual that i put in under. I got a signal to work but it was not working properly. Any one done something like this? Best regards Lars Erik Nilsen Baud Rate This message will change the baud rate of the MicroPDM. No other devices should be on the CAN bus when this message is sent. Note that you will also need to change the baud rate of the keypad and all other devices on the bus to match the new baud rate. Identifier 0x322E12 (primary PDM) 0x322E22 (add-on PDM) Format Extended Direction To MicroPDM Byte 0 0x03 Baud Rate message Byte 1 0xYY Baud rate 00: 1 m 01: 500k 02: 250k 03: 125k Byte 2-7 0x00 Not used Examples: Direction Identifier Message Description To MicroPDM 0x322E12 03 01 00 00 00 00 00 00 Change primary PDM baud to 500k To MicroPDM 0x322E22 03 00 00 00 00 00 00 00 Change add-on PDM baud to 1m Button Action This message will turn a button ON or OFF. The message will have no effect when the MicroPDM is in Standby Mode or Configuration Mode. Identifier 0x322E12 Format Extended Direction To MicroPDM Byte 0 0x02 Button Action message Byte 1 0xYY Button key number, zero indexed. Byte 2 0xZZ Button state 00: Turn OFF 01: Turn ON Bytes 3-7 0x00 Not used Quote Link to comment Share on other sites More sharing options...
Adamw Posted January 27, 2023 Report Share Posted January 27, 2023 So do you have a Link PDM or a MicroPDM? Can you explain in detail what you are trying to do? To send RPM and speed to the PDM you would use one of the CAN Aux frequency channels, but i'm curious why would a PDM need to know speed or RPM? The CAN message structure for the Link PDM is available in the PDM help file or the G4X ECU help file. I think the info in the G4X help file is a bit clearer with examples for the sequential ID's etc so that is probably the better resource. Navigation: G4X ECU Tuning Functions > CAN > Link Razor PDM Quote Link to comment Share on other sites More sharing options...
Lars200 Posted January 27, 2023 Author Report Share Posted January 27, 2023 I have a link PDM of course:) The PDM starts the fuel pump. And i Norway the pump has to stop if the engine stops. Rules in racing series i drive. Does the pdm read in little-endian og big? I have the Link g4+ concted to the aim. And can bus 2 from aim to pdm whit a key pad on. Key pad works fine. But i want the fuel pump of when the engine stops. And cooling fan of when the car gets over 30km/h and back on when car goes under 30. Engine over 85 degrees. I will have a look there. Il load up some picture later to explain better Quote Link to comment Share on other sites More sharing options...
Adamw Posted January 27, 2023 Report Share Posted January 27, 2023 Typically the fuel pump and fan control logic is done by the ecu, then you just send the on/off request to the PDM. It is very unusual to have the PDM connected to the dash rather than the ecu. Multibyte data should be MSB first/Big Endian. Quote Link to comment Share on other sites More sharing options...
Lars200 Posted January 27, 2023 Author Report Share Posted January 27, 2023 Had a look inn the G4X ECU Tuning Functions > CAN > Link Razor PDM This was perfect. That was the info i was looking for:) Had a old version on my computer, Update now and i found it. Big thanks Yes i know its a bit strange to have the ecu to the aim. The PDM only needs 2 messages from aim then every thing will work. And now i can log the important things from the pdm inn the aim. Fuel pump and cooling fan. And i have a G4+ not x engine Ecu. Would do i another way if i had a G4X. Quote Link to comment Share on other sites More sharing options...
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