Re: Unique ID & Acknowledgement in CAN

Hello,

1: If you have two or more devices transmitting with same CAN-ID, 
collisions outside arbitration field
exist and your system may work some time or may enter sooner or later 
bus-off state.

2: CAN transmissions are monitored in two ways:
- Acknowledge indicates that at least one other device has received 
transmission correctly
- Error frame indicates, that at least one other device has recognized an 
error

=> Ack and no error means successful transmission.

=> If you need confirmation from the actual consumer, you neet take care 
of such confirmation in
application layer. The best way for such is to use state machines in both 
producer and consumer
and bidirectional signaling between them.

Best regards,

-H





PDE-Elect - Software Team 1




From:   PDE-Elect - Software Team 1 <[email protected]>
To:     CANLIST <[email protected]>
Date:   05.02.2013 14:54
Subject:        [CANLIST] Unique ID & Acknowledgement in CAN
Sent by:        [email protected]





Hi techies, 

1. If i am using same CAN id in 2 different nodes. what will happen.? 
Whether any error will occur or Tx will be in proper..? 

2. How the acknowledgement works in CAN.? How the sender knows the 
acknowledged frame from receiver.? 

Regards,

BoopathiRaja.G | Product Development Engineering Electronics,
0422-4331608 | [email protected]

Pricol Limited

Website : www.pricol.co.in
Address : 132, Ooty Main Road, Periyanaikanpalayam, Coimbatore, 641020, 
India.
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