Tech Forum

Hi folks

My camper van has a PDM 15 controlling the electronics which run from the leisure battery. (Internal lights, electric pump on the sink, fridge etc)

The leisure battery failed recently, so i had it replaced. It is now working, but there's no power to anything.

The blockage seems to be the PDM. I've connected to the PDM via the USB, and managed to establish a connection, to try and diagnose the fault. I seemed to be getting somewhere, but then i must have unplugged the USB it at the wrong time, because now the computer says "the USB device has malfunctioned" (or similar error) and when I look on device manager, it has a warning sign associated with that USB port.

When I try to connect the PDM, sometimes it works, and sometimes it seems to work, and then says "device unplugged" almost immediately.

I've restarted my computer,…

I’m triggering the starter solenoid from one of the 4 high current outputs. It sounded a little odd and quickly broke a starter. After installing another starter I video’d it in action and you could see playing back in slow motion it was oscillating rapidly. The only workaround I’ve found temporary is to set minimum on time to .2 sec but this is not ideal, as it causes the starter to hang on once the motor fires. What am I doing wrong? It’s a race car, 16v lithium battery.

Hi,

PDM15 (v1 I believe) with v1.1.6 SW with a Rife analog temp sensor connected to an input. How do you get Sensor Calibration tables to work? I have it configured but it always outputs 0. I tried fudging it with a 2D table which did work, which makes me think it's a bug in v1.1.6?

Thanks

Simon

Hi all,

I'm using a PDM25 as the central control and logic unit in an EV conversion — it drives the HV contactors and passes on shutdown commands from a separate BMS via CAN. Mine is the earlier revision (it came with the PDM 15/25 manual, not the newer 15/25/35 one), so I'd like to confirm a few behaviours against the right hardware before I finalise the safety design.

Three questions:

1. If the processor hangs or locks up while the unit is still powered, what happens to the outputs — do they hold their last commanded state, or switch off? I'm trying to work out whether a locked-up PDM could leave an output (and therefore a contactor) energised.

2. Is there any internal watchdog or fail-safe that switches the outputs off if the processor stops running normally? Or would I need to add an external heartbeat for that?

3. Can the PDM's…

Hey everyone, I am having an interesting issue. My ECU keeps randomly restarting. I have included a video of the issue. The HS Status on the output goes to 4 which is not listed in the manual anywhere, and the output does not show tripped. I have already replaced the entire engine harness to the ECU. Does this seem like a PDM issue or the ECU itself? Any input would be greatly appreciated!

Hello everyone, someone has a Emtron keypad (grayhill 8) working with the pdm? I would like the hardwire pdm to control it, not the emtron, I try with ID 900,901,902 that is what I could find on the Emtron information but never show up as connected. Any input would be appreciated.

Hey guys, recently got my car back from mapping and noticed that the pdm wasnt switching off with the switch, im having to trip the main power to get it to power down. i current have voltage coming out of my input channels, comfirmed with mulitmeter some have 11.9v others have 1to6v. bit off a loss why this has happened. latest version of softwear. photo attached.

Thanks for any help

Andy C

Annual inspection time in the airplane and checking firmware and making a few config changes. Says I have a V2 PDM-15 but can that be right? What firmware/sw should I update to?

I see you are making your way into some aviation with Virgil/Bearhawk! Good to see - mine continues to run flawlessly!

Hi, I am looking to import a CAN configuration file that was created by my GEMS ECU software in DBC format, I can't export the data in any other format.

I have tried to import that file directly but nothing changes. Is there a conversion utility in use to format it correctly for Hardwire?

TIA

Nigel