NEITHER 9852 communication with fault tolerant CAN materials

Hello

I have a cRio 9074 and recently bought a module NI 9852 2-port low-speed/fault-tolerant CAN.

It's my first attempt at network comms in cRio and I realized that none of the devices with that I want to communicate are immune to failures and fault-tolerant physical layer requires different endings to 'normal' high speed MAY (immediately after I broke the seal on the box, of course!)

Is it possible that I can configure the physical layer for this configuration to work reliably (alebit to)< 125="" kbps="" and="" with="" no="" fault="">

Kind regards

Chris

I'm sorry. The low speed / transceivers and breakdown-tolerant high speed MAY use different communication protocols.

HS CAN is recessive when CANH and CANL are both to nominally under 2, 5V. It is dominant when CANH is 3.5V and CANL is 1, 5V.

LS CAN is recessive when CANH is a CHANNEL and 0V to 5V. It is dominant when CANH is 3.6V and CANL is 1.4V.

You can see that they are almost the same for the dominant, but different for recessive. In addition, the sequence of end between two buses is different. For a HS-bus, you usually resistance 120 ohm between CANH and CANL at both ends of your bus.  A bus of the LS, you have a terminating resistor separate for CANH and CANL (for RTH and RTL).

Tags: NI Products

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