Fieldbus Control; Chapter Overview; System Overview - ABB ACS800 Firmware Manual

Fieldbus control

Chapter overview

The chapter describes how the drive can be controlled by external devices over
a communication network.

System overview

The drive can be connected to an external control system – usually a fieldbus
controller – via an adapter module. The drive can be set to receive all of its control
information through the external control interface, or the control can be distributed
between the external control interface and other available sources, for example,
digital and analogue inputs. The following diagram shows the control interfaces and
I/O connections of the drive.
ACS800
Fieldbus adapter
Rxxx
RMBA-01 adapter
std. Modbus link
Slot 1 or 2
RDCO comm.
module
Parameter R/W requests/responses
(
* Either an Rxxx or Nxxx, and an RMBA-01 adapter can be connected to the drive simultaneously.
Other
devices
Slot 1
CH1
AIMA-01 I/O
(DDCS)
adapter module
CH0 Fieldbus adapter
Nxxx
(DDCS)
or
Data Flow
Control Word (CW)
References
Status Word (SW)
Actual values
Fieldbus
controller
Fieldbus
(
*
Controller
Modbus
(
*
I/O adapter
RTAC/RDIO/RAIO
Process I/O (cyclic)
Service messages (acyclic)
(
*
Advant
controller
(Eg AC 800M,
AC 80)
Fieldbus control
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