Abb Drives Communication Profile; Control Word And Status Word; References - ABB FSCA-01 Manual

Modbus protocol, rs-485 adapter module

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ABB Drives communication profile

The Control Word is the principal means for controlling the drive

from a fieldbus system. The fieldbus client station sends the

Control Word to the drive through the adapter module. The drive

switches between its states according to the bit-coded instructions

of the Control Word and returns status information to the client in

the Status Word.

The contents of the Control Word and the Status Word are

detailed in Tables

presented in the ABB Drives profile state machine (Figure 9).

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 (eg, the FSCA-01 RS-485 Adapter

Module). To have the drive controlled through the fieldbus, the

module must be defined as the source for control information, eg,

Reference.

and

respectively. The drive states are

Communication profiles

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