Fieldbus control through the embedded fieldbus interface (EFB) 341
9
Fieldbus control through the
embedded fieldbus interface
(EFB)
What this chapter contains
The chapter describes how the drive can be controlled by external devices over a
communication network (fieldbus) using the embedded fieldbus interface.
System overview
The drive can be connected to an external control system through a
communication link using either a fieldbus adapter or the embedded fieldbus
interface.
The embedded fieldbus interface supports the Modbus RTU protocol. The drive
control program can handle 10 Modbus registers in a 10-millisecond time level.
For example, if the drive receives a request to read 20 registers, it will start its
response within 22 ms of receiving the request – 20 ms for processing the
request and 2 ms overhead for handling the bus. The actual response time
depends on other factors as well, such as the baud rate (a parameter setting in
the drive).
The drive can be set to receive all of its control information through the fieldbus
interface, or the control can be distributed between the embedded fieldbus
interface and other available sources, for example, digital and analog inputs.
Summary of Contents for ACQ80
Page 1: ... ABB DRIVES FOR WATER ACQ80 standard program control Firmware manual ...
Page 2: ... Related documents are listed on page 13 ...
Page 4: ......
Page 10: ...10 Table of contents ...
Page 32: ...32 Startup control with I O and ID run ...
Page 34: ...34 Using the control panel ...
Page 74: ...74 Program features ...
Page 78: ...78 Control macros ...
Page 380: ...380 Fieldbus control through a fieldbus adapter ...
Page 384: ...384 Parameterization with Drive Composer ...
Page 388: ...388 Parameterization with Automation builder drive manager ...