GE IS220PTURH1A Combustion engine module

Each standard function block is defined uniquely by its type and block name. The type name must commence with a letter and may not exceed four alphanumeric characters.155 type names are occupied by the system. The remaining 100 type names are available for user function blocks. The block name may not be longer than 4 characters. Special characters and symbols (documentation uploading are not permitted. The combinations 0B and 1B are not permitted for the first and second character. The function of certain block types requires the use of figures only as a block name. These figures are sometimes even limited to special values (e.g. GP.1, GP.2, ... GP.56)

Method of Operation

 The software modules in the automation systems, the so–called standard function blocks, take over the tasks of conventional devices or modules. It is additionally possible to generate new function blocks (so–called user function blocks) (see Chapter 5.3). Following loading of the system software, the standard function blocks are available in the write– protected system RAM of the automation system. Data sets must be defined for them; these are stored in the user RAM. The function blocks are processed cyclically (also acyclically depending on the application) in order to solve the automation task. The mode of operation of the automation systems therefore primarily depends on the function blocks and their configuring, i.e the data sets entered specific to the application.

Design of Standard Function Blocks 

A standard  function block (see Fig. 2.2) consists of a program and variable data. The program ( in the system RAM) contains at least the data description, algorithm and original parameter set. The variable data (in the user RAM) are the data sets with the configuring and operating data. The configuring data of a standard function block are understood to be the application–dependent parameters and linking information, operating data are understood to be the process–dependent operating modes, values and states.A new data set is generated as follows using the configuring instruction DEFINE (D,...;) : the original parameter set is copied and stored in the user RAM. The resulting data set is then assigned system–specific configurating data

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