<< Click to Display Table of Contents >> Navigation:  How To > How to set up SDO communication in CANopen

You want to

a) request a value from an ECU / sensor

b) read a value with the ECU from the display device

c) write a value with the ECU to the display device

 

- include the CANopen protocol for the CAN port you want to use

- set up IDs for PClient SDO Server Channel and PClient SDO Client Channel in the Terminal and Owner ECU Configuration dialog

- so make it clear:

COB-ID Client ->Server (rx) is the ID that the ECU uses to read / write a value from / to the display device (used for b) and c))

COB-ID Server->Client (tx) is the ID that the display uses to respond a read / write request from the ECU (used for b) and c))

 

COB-ID Client ->Server (tx) is the ID that the display device uses to read a value from the ECU (used for a))

COB-ID Server->Client (rx) is the ID that the ECU uses to respond a read request from the display device (used for a))

 

a)

- create the variable you want to read from the ECU (data type must match!)

- open the Variable Manager

- set the ECU as the owner of the variable

- set the ECU index and ECU sub index of the variable according to the index / sub index the variable has in the ECU

- use the JavaScript function requestVariableValueFromOwner to request the value of the variable from the ECU

 

b)

- create the variable that the ECU wants to read (here the internal index / sub index are used)

- the ECU needs to send a read request message for the variable

 

c)

- create the variable that the ECU wants to read (here the internal index / sub index are used)

- the ECU needs to send a write request message for the variable