Hello everyone,

I'm trying to use the CANBus API I found in the CodeSys Store (documentation here) but I can't figure out how the filtering process works.

I have a CAN bus with 2 devices and I want to only receive the messages containing a specific ID (10614061). I thought it was possible using the receiver mask object of the CANBus API but I don't understand what I'm supposed to write in the parameters values...

FYI I'm running the base example given in the CANBus API and I only tried modifying the mask configuration like this :

(* Defines a mask for the receiver *)
maskConfig      : CAN.RECEIVER_MASK := (
                                    dwIdValue:= 10614061,
                                    dwIdMask:= 0,
                                    xRTRValue:= FALSE, 
                                    xRTRMask:= FALSE,
                                    x29BitIdValue := FALSE,
                                    x29BitIdMask := FALSE,
                                    xTransmitValue:= FALSE, 
                                    xTransmitMask:= FALSE,
                                    xAlwaysNewest:=FALSE);

However I'm still receiving all the messages going through the CAN bus, it doesn't filter anything.

What am I doing wrong ?

As you have a long ID, you should set the x29BitIdValue and Mask to TRUE.

The mask works in a way that if you set the bit to 1, that it should exactly match the bit in the received message. If you set this to 0, then you don't care. So if you set the mask to 16#1FFFFFFF (29 bits bit true, so should exactly match the dwIdValue), then you should only see the message you want to see. For more information see: https://content.helpme-codesys.com/en/libs/CAA%20Can%20Low%20Level%20Extern/Current/CAN-Low-Level/Functions/Basic-Functions/CreateMaskReceiver.html