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Communication profiles

The ABB Drives communication profile

The Control Word and the Status Word

The Control Word is the principal means for controlling the drive

from a fieldbus system. It is sent by the fieldbus master station to

the drive through the adapter module. The drive switches between

its states according to the bit-coded instructions on the Control

Word, and returns status information to the master in the Status

Word.

The contents of the Control Word and the Status Word are

detailed in Tables 10 and 11 respectively. The drive states are

presented in the ABB Drives profile state machine (Figure 12).

References

References are 16-bit words containing a sign bit and a 15-bit

integer. A negative reference (indicating reversed direction of

rotation) is formed by calculating the two’s complement from the

corresponding positive reference.

ABB drives can receive control information from multiple sources

including analogue and digital inputs, the drive control panel and a

communication module (e.g. FPBA-01). In order to have the drive

controlled through the fieldbus, the module must be defined as the

source for control information, e.g. Reference.

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ABB FPBA-01 Bedienungsanleitung Seite 52