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These documents should be referred to for hardware and software setup as well as for any variables specific to each bus. We also recommend consulting one of the Altivar 58 programming guides for additional explanations operation, factory settings, etc. The chart below has been adapted to the characteristics of the Altivar 58 to facilitate programming. Each state represents an aspect of the internal behaviour of the speed controller. The speed controller status can be modified by sending a control word CMD or by the occurrence of an event example : lock following malfunction.
The speed controller status is given by the value of the status register ETA. In local forcing all write requests from the fieldbus are refused. The local forcing output must be monitored, as line control is restored at the current chart step at the moment of interrupt caused by local forcing.
Communication principle The Altivar 58 can be connected to two fieldbuses : - the first using an optional communication card installed in the speed controller. The fieldbus connected to the communication card always takes priority. However, the fieldbus which is not controlling the speed controller may send configuration words only when the motor is stopped or adjustments, and read signalling words.
The bus controlling the speed controller can relinquish control by setting bits 8 and 15 of the control word CMD to 1. For safety reasons its use must be restricted to the debug phase. The commands are combinations of the 5 mandatory bits.
Schneider Electric 58 TRX User Manual
Where can I find basic programming information for the ATV58?