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i have a problem about the water pump when i switching of the engine is not staying on i am confused i am using pwm with can communication so when i switching the ecu of the temperature is going off im not sure what is this problem
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Hi does any one work with the pro software on pdm 25 me is telling me for the password but i connected is telling me is on with the green plug in the bottom corner
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I have several devices all happily communicating on a can bus. The PDM25 is one such device on that network. Whilst the PDM is powered ON, the traffic on the network is all fine. I can scope the traffic and see the waveforms are well formed and timings correct. However, if the PDM is powered OFF it takes down the network with it. The waveform is completely suppressed to zero, it vanishes.
The PDM is NOT configured with a termination resistor as the network already has two nodes configured with this, and the bus resistance is the required 60ohmns. Why is the PDM disrupting the network like this?
All other devices on the network can be powered up/down independently without disrupting the network. With the PDM off, it must be physically disconnected from the network before the other devices can operate again. This certainly isn't correct or expected behavior f…
Any thoughts? Devices on this bus must be able to be powered up/down independently without effecting the bus. This is a show stopper for us.
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I want to setup an automatic fuel transfer using the sensor calibration (FUEL_LEVEL) input. My goal is the fuel pump turns on when the calibrated fuel tank level reaches 4 gallons and off at 9 gallons. I am using the counter to make it work but is there a better way to achieve this without the counter?
on if
CAN keypad 1 Button 4 state equals true
Thanks
you could possibly get a similar result using generic functions. on if equal to or greater than 4. and value is less than 9. that way the value is true if it's greater than or equal to 4 gallons. and on if its less than 9. they're for keeping the level between 4-9 gallons
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I'm strongly considering using a PDM15 with my project car but I have a question regarding items which always need to be functional regardless of the 'ignition 'state' of the car. As I understand it, it is not recommended to permanently connect the PDM15 ignition input to +12v as this drains the battery over time. Is there a way then to program the PDM15 for a hazard light function without the ignition terminal being connected to 12v?
Thanks,
Trevor
for a simple task of hazard signals its probably best to just use a flasher relay. but i needed power steps to come out and be controlled by the pdm i just used a relay and diode to trigger the ignition on for the pdm.
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Hi smart people,
I am working on an EV conversion, and I'm using speedhut CAN based guages. I have room for only one temperature guage (temp range 0-100 celcius), but would ideally like to have the option to see the temp on both the electric motor and its inverter.
Here's my current approach:
The guage will only read one pre-defined CAN message, so I've defined two CAN outputs in the PDM config that will send the correct message to the guage when activated.
I'm sending two different CAN messages from the motor / inverter (with different addresses (not the same as the message required by the guage) and I have successfully parsed the right data into the CAN output messages.
I'm trying to use a PDM switch input (true, false) to specify which of the two CAN messages are sent to the guage.
Me again, I solved it! Most likely that will happen a lot over the next few weeks... For those who are interested - the solution was in the Maths Section - using 'choose' to feed one of two alternative values into the CAN output
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Is there an application available to run on Apple IOS tablet to monitor outputs etc. or plans to create one?
Hi, Unfortunately the PDMs dont have bluetooth or wifi so there isnt the option to communicate wirelessly
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Hi, I have asked this before, will there be a new firmware with improvements to the wakeup time for PDM15? It was not like this when I bought it, i think it was firmware 1..12 or something like that. Then a 2 second delay occured after it gets power, it´s very annoying Is there anything that can be done in the software to speed things up ?
Keith: Yes, that is an option for a racecar ich (too have a kill switch I mean) but for a street car that would require the PDM to have constant 12v from the battery ... and then conditions on all input/outputs to only enable with some other condition (keypad button for example) ...... it is of course possible, but far from ideal. I would like to skip having a kill switch
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Hi there brains trust, I'm converting a car to electric and I want to use the PDM 25 to implement a few safety measures. I'm hoping someone can guide me on how to configure my outputs on a PDM 25 for the following:
I want to ensure that the High Voltage system can't be activated unless the driver has their foot on the brake pedal.
I want to ensure that the driver cannot select forward or reverse unless they have their foot on the brake pedal.
I've tried using an AND function where HV out can't be triggered unless the HV switch has been on and the brake pedal is also pressed, but when the brake pedal stops being pressed, the HV system shuts down. I looked at counters and general functions, but could not work it out. Sadly the user manual gives no example that would help.
Has anyone found…
i actually just did this on an ev build along with a PRD selector with momentary buttons so only one can be activated at a time. like other people gave commented i used a counter.
Where is your CAN input water temp value coming from? Also what is the output logic function