PDM25 causing can bus issue
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 for a can device.
Thoughts?
Thanks Rob
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.