GE Multilin G650, Manual, Page: 284 / 639

GEK-113285A G650 Generator Protection & Control System 5-141
5 SETTINGS 5.9 LOGIC CONFIGURATION (PLC EDITOR)
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5.9LOGIC CONFIGURATION (PLC EDITOR)
Setpoint > Logic Configuration
The G650 logic allows setting the relay logic configuration using a sophisticated and complete program based on standard
IEC 61131-3, with block diagrams, which is described in this section.
5.9.1 INTRODUCTION
The logic configuration (or PLC Editor) tool is a graphical design tool that allows the G650 built complex logic diagram in an
easy way using different logic functions.
The logical configuration is performed using graphical functions based on the IEC 61131-3 standard.
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This standard defines five basic ways of programming:
•Sequential Function Chart (SFC).
•Instruction List (IL).
•Structured Text (ST).
•Ladder Diagram (LD).
•Function Block Diagram (FBD).
Out of these five methods, FBD has been chosen because it allows for graphical configurations that are more
comprehensive. This method provides the possibility of grouping several basic functions inside a single function (hereon
called libraries), achieving higher modularity and clarity in the design.
Please take note of the following remarks:
The first equation entered in the PLC can never be a timer
Analog elements (analog comparators, etc,) are not implemented.