3 Basics

IL•1F CANopen DS301

Handling of errors If the master toggles bit 7 (MT), this is interpreted by the slave as a re- quest to start an operating mode or to change data of the current oper- ating mode. If the request cannot be processed, the active operating mode is not changed and the slave sets bit 6 in modeStat (ME = ModeError).

The active operating mode is not changed and there is no state transi- tion.

Bit 6 (ME) remains set until the master toggles bit 7 (MT) in modeCtrl again, thus triggering a new command.

The master can read the corresponding error code by a read access to parameter ModeError.

Possible reasons for a failure of the operating mode request:

Reference values outside the value range

Change of the operating mode during processing (impossible)

Invalid operating mode requested

The device is not in state 6 (Operation Enable) of the state machine.

For more information see the product manual.

0198441113586, V2.01, 11.2008

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Fieldbus interface

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Schneider Electric manual Basics IL1F CANopen DS301