As-I - ABB PST Installation And Maintenance Manual

100
AC 1006.9 - 5/03
Chapter 8 - Fieldbus communication (option)
8:1.2

AS-I

The AS-I protocol is a simple fieldbus protocol with a few digital inputs and
outputs. Through the outputs, the motor can be started / stopped and an addi-
tional action can be performed depending on the selected function on the
programmable input In0. The inputs correspond to the programmable softstarter
outputs (K4 - K6 and V7) where status information can be acquired according to
the set function.
See Chapter 7 " Settings and configuration" for programming the inputs /
outputs.
Before the AS-I fieldbus can be put into operation, the following parameters must
be set in the softstarter:
Parameter Fieldbus Ctrl set to Yes
•
• Parameter Fieldbus Type set to AS-I
Warning!
If the motor is running and the parameter Fieldb Ctrl is changed from No to
Yes, this will stop the motor (fieldbus control overrides the programmable
inputs).
If the motor is not running and the parameter Fieldb Ctrl is changed from
Yes to No, this might start the motor if there is a start signal present.
For installation and commissioning of the AS-I fieldbus, see document
2CDC191002D0202 available at www.abb-control.com/html/products/
soft_strs.html.
If In0 is programmed as "enable," it must always be set together with a start
command.
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