CANopen Network Interface

Importance of These two monitoring mechanisms are especially important in the CANopen

Monitoring system. Devices connected to the bus do not regularly indicate their presence in operating mode, commanded by "Event".

Slave Monitoring Monitoring is performed in the following way:

Phase

Description

1The master sets "Remote-Frames" (or "Remote-Transmit-Request" request messages) on the "Guarding-CobID" of the slaves to be monitored.

2The slaves concerned respond by sending the "Guarding" message. This message contains the "Status-Code" of the slave and the "Toggle-Bit", which changes after each message.

3The NMT (Network Management Telegram) master compares the "Status"and "Toggle-Bit" information:

If they are not in the expected state or if no response is received, the NMT master considers that an error has occurred on the slave.

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Schneider Electric IP67 manual Phase