CANOpen

nicofer · Joined: 01 May 2013 Posts: 90 Location: GRJ

hi

A year or so ago there was a post regarding Bascom AVR and CANOPEN

Well - depending on what you need to do it is quite possible and very easy to get working.

I have a few boards with Can128 , used as inputs and outputs , in a Festo and Schneider PLC system running CODESYS .

One need to create a XX.EDS file with the configuration of the board so best is to start with a similar type of product and edit it for own use and need to 'clone ' an existing user / manufacturer ID , for development or private use .

The idea is not to implement a full CANopen stack - or use it in safety critical devices , but at least the basic objects to control the board and get data to and from it.
Once the node is activated with a few commands , the data is sent as required. It can even be active after sw-on so then you do not even need
to have the node activation code to start sending / receiving data .

It is also then very easy to expand and add more CANOPEN functions or options as needed .

We use it as an absolute magnetic encoder with a AS5600 and also for 4-20 mA input and valve output - incl PWM , 8 nodes running Bascom with 3 Schneider VFD units , 11 nodes total in the one system . All that with a 4ms update rate

The can implementation of Bascom AVR make it super easy to do this.

(BASCOM-AVR version : 2.0.7.8 )

JSEDDY · Joined: 30 Apr 2008 Posts: 21 Location: Edmonton

I seem to be in a similar place with a string of downhole boards, one of which I have to upgrade.

The bus master is a little dsPic with a Canopen stack in it. The docs I have are in C.

I can output my CanMobs onto the bus with Cansend, and I get an ACK back from the bus master.

I have no idea how to get the master to process and forward my data.

So how would I create this ***.EDS file?