Tech Forum

Trying to get Holley Dominator CAN data working on an older Hardwire PDM25+ V1. Firmware 1.15

The newer PDM28 imports the Holley DBC fine, but the older PDM25 software doesn’t have a Float data option.

I know this has been done before. Does anyone have the correct setup or an old Holley/PDM25 configuration they can share?

Mainly trying to get RPM, MAP, TPS, coolant temp, etc. working over CAN.

Hoping to get some guidance on this. This is my first PDM and have been enjoying the experience until today. This is a fresh build that is undergoing the shakedown phase. I have PDM25 that is controlling everything on my car and has been working well until today. I backed out of the driveway and the car shut off. pushed it back in the driveway and opened the laptop to see all the active outputs in over current fault and cant figure out why. The only things I've changed since the last drive was I moved a shared output to its own individual one (as I had some extra space)and it worked for the first few minutes during engine warm up before it died. I have even unpinned that output and its still shows over current fault unless i disable it. What could cause this type of failure? I spent…

does anyone know if their is a way for the pdm to hold the count of a counter after it has been powered down. for example, i have a loop around counter for an electric ebrake. 0 is disable ebrake, 2 is nothing 3 is apply and 4 is keep button light on. 2 and 4 are holders after a set time or current limit is reached. my issue I'm having is if i apply the ebrake it will hold the button light on and ebrake on. but if i cycle the ignition off and back on the ebrake stay active because with ignition on it cycles the counter to 2 which is an empty holder. but in order to get the light to come on stating the ebrake is still applied you must press the button again and it will move counter to 3 run ebrake calipers and the…

Need help with Ft700 can config. Can't download it. I have a Pdm 28 downloaded the latest version 1.3 Thank you

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!