Default Start-Up - Siemens SIMATIC Distributed I/O System DP/ASi Link Manual

5.3.3

Default Start-Up

Introduction
You can also configure and assign parameters to the DP/ASi link from the DP
standard master by means of a "default start-up". In a default start-up, the
DP/ASi link operates with preset parameters, which are described in detail on
the next few pages. The information is important if you wish to operate the
DP/ASi link on the DP standard master of a manufacturer who does not pro-
vide an easy-to-use configuring tool.
Requirements for The DP standard master must be able to process the following messages:
DP standard
master
Characteristics
The following characteristics apply to a default start-up:
Note
The current ASi configuration is always applied as the setpoint configuration
every time the DP/ASi link starts up. This means that ASi slaves which have
failed are no longer detected or reported after a re-start.
If you wish to monitor the ASi configuration, you must compare the actual
configurations (bytes 16 to 31 of the diagnostic message) in the user pro-
gram.
Distributed I/O System DP/ASi Link
EWA 4NEB 710 6055-02b
20-byte configuration messages
7-byte parameterization messages
32-byte diagnostic messages
The I/O area assigns 16 input bytes and 16 output bytes.
The location of the ASi slave in the I/O area is uniquely defined by its
address. The distribution of ASi slave inputs and outputs is determined by
their I/O codes.
Upon start-up, the DP/ASi link automatically sends the parameter F
all the ASi slaves connected.
The ASi slaves present during start-up are detected as the actual configu-
ration and accepted as the setpoint configuration at the same time.
Configuring the DP/ASi Link
to
H
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