ABB FPBA-01 Manual de usuario descargar pdf (Pagina 45)

Communication profiles

The PROFIdrive communication profile

The Control Word and the Status Word

The Control Word (PROFIBUS Parameter 967) 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 (PROFIBUS

Parameter 968).

The contents of the Control Word and the Status Word are

detailed in Tables 7 and 8 respectively; see the drive

documentation for information on the drive-specific bits. The drive

states are presented in the PROFIBUS State Machine (Figure 9).

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 PROFIBUS, the communication module must

be defined as the source for control information, e.g. Reference.

Scaling

The speed reference (REF) in hexadecimal (0 … 4000h)

corresponds to 0 … 100% of Maximum Reference (as defined by

a drive parameter).

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ABB FPBA-01 Manual de usuario Pagina 45