How To Parameterize A S900 Station In Mode 1 - ABB S900 Manual

configuration. The master needs the configuration to be able to interpret the
I/O data of a slave.
In the first slot the CI920 has to be configured. There are two types or
variants of a CI920. The difference is the number of I/O data for the CI920
itself. The first variant delivers or accepts no I/O data, the second one accepts
and delivers two bytes each. The meaning of the I/O data is not further
described here. Up to 16 I/O modules can be "plugged in" then.
Gaps between configured modules has to be filled with Empty Slots.

How to parameterize a S900 station in mode 1

To drive a PROFIBUS DP slave in the "DataExchange" state, the parameters
and the configuration (in this order) must be sent by a master. In the
engineering tool of the master the configuration must be defined first.
The parameter set consists of standardized parameters (EN50170) and of a set
of User_Parameters. The interpretation of the User_Parameters is always
vendor-specific. In the standardized parameter part, only some simple settings
need to be made to set up correct PROFIBUS communication. This part is set
up automatically on nearly all master systems. The User_Parameters are
defined in the GSD file and are described in this document.
The first three bytes must be set constantly to 0x00, 0x00 and 0x00. Check, if
your engineering tool does this correctly!
Then four bytes must be set for the CI920 The meaning of the individual bits
is described in the corresponding sheets. It is easier to edit the numbers in
hexadecimal format, but not all masters accept this.
In position 7 of the User_Parameters the parameter data for the first I/O
module begins. There is one sheet for every kind of module. Some modules
are physically equal, but differ in the number of I/O data! This is the reason
why sometimes the "same" module comes with two variants (see AI4H-Ex,
for example). The one byte parameter is divided into two nibbles of four bits
each. The nibbles are called subsets.
Subset one, which corresponds to bits 4 to 7 of the data byte, consists of the
error monitoring and failsafe behavior. This subset is equal for each I/O
module! First select a line which includes all requested parameters. The first
3BDD010422R0101
Communication Interface for PROFIBUS DP, CI920
I/O System S900
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