ABB S900 Manual

ABB S900 Manual Manual pdf 21 page image

I/O System S900Communication Interface for PROFIBUS DP, CI920Note that the use of the original GSD file from the vendor is mandatory forproper functioning of the slave. Any modification of the GSD file may causeserious errors and is at the user's own risk.The GSD file contains communication-specific parameter like the supportedtransmission rate, and possible parameters of the slave. S900 is a so-calledmodular slave. Contrary to a compact slave, a modular slave has a variablestructure, since it consists of several modules. The arrangement of themodules in the station is called the hardware configuration. The GSD filedescribes the individual modules and their characteristics. Among these are:• Quantity of input data• Quantity of output data• Settable parameters• Diagnostic informationAdditionally, the system limitations are specified, e.g. the max. number ofmodules, the max. quantity of input and output data, etc.Module description in the S900 GSD fileOn PROFIBUS single modules of a modular slave as S900 are identified bythe quantity of I/O data and its structure. Additionally in a GSD file theparameters can differ for modules with the same quantity of I/O bytes. Thereare some I/O modules with a variable quantity of I/O data (e.g. AI930 candeliver up to 8 secondary HART variables). For this reason the S900 GSD filecan contain more than one variant for an I/O module. The selectable moduleis described as order number and variant in brackets. For exampleAI950 (TI4 R).CompatibilityWithin the I/O System S900 the downward compatibility is ensured: A CI920with newer firmware runs with older I/O modules within a project. To use thefull functionality of the I/O System S900 the following GSD - file versionsshould be used.3BDD010422R0101 21