I am using straight Codesys

version 2.3. I have been checking CANOpen Communication using the sample

project CANSlaveXS.pro using RM CANView USB device and target as CCPXS 10.4 . I have following

obsevations and queries. Kindly have a look and give your comments.

1) I am able to transmit PDOs from the sample project to the RM CANViewUSB

device Interface. But unable to recieve PDOs to my application.

{ This I can say because I am receiving PDOs in RM CAN-Device Monitor with

same COBID & data bytes as present in Global variable pCanDevPDO_Tx in

CanOpen implicit Variables(Constant) Global object In Resources tab. But I

am unable to recieve databytes but the COBID in Global variable

pCanDevPDO_Rx sent by RM CANView USB device }

2) Also in the variable list in parameter manager if i define some variable

as read-write then it does not reflect in the PLC Configuration PDO mapping.

In that case how can I map those Read-Write PDOs as like what is done in the

sample project?

Cheers n Regards,

Rajat Bansal

Hi, Rajat Bansal

I think that you have to use the function Can_SetFilter located in 3S_CanDrv.lib.

You have to specify the valid COB id:s you want to receive.

The first parameter is set zero (first CAN Controller), second parameter always 0. Third parameter is the COB:ids allowed first 16 (MSB) the 16 (LSB) Ex. 0x2010201 lets PDO with COB Id 0x201 pass.

I've had the same problem when using a device..

Originally created by: Carmichael_keith

Hi Hassi, can I just confirm that you are saying that parameter 1 is the CAN Master Node ID?