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section level 1 1
figure bi level 1
table_big level 1
restart lowapp ARestart oddapp: ARestarts for autonumbers that do not restart in
each chapter. figure bi level 1, reset table_big level 1, reset chap_big level 1, reset1
Lowapp Alwbox restart evenap:A1app_big level 1, resetA figure_ap level 1, reset
table_ap level 1, reset figure level 1, reset Figure 1. table level 1, reset Table 1.
these restarts oddbox reset: 1evenbox reset: 1must be in the header frame of
chapter 1. a:ebx, l 1 resetA a:obx:l 1, resetA a:bigbx level 1 resetA a:ftr level 1 resetA
c:ebx, l 1 reset1 c:obx:l 1, reset1 c:bigbx level 1 reset1 c:ftr level 1 reset1
Reminders for autonumbers that need to be restarted manually (first instance will
always be 4) let_in level 1: A. B. C. letter level 1:A.B.C. num level 1: 1. 2. 3.
num_in level 1: 1. 2. 3. rom_in level 1: I. II. III. roman level 1: I. II. III. steps level 1:
1. 2. 3.
restart lowapp ARestart oddapp: ARestarts for autonumbers that do not restart in
each chapter. figure bi level 1, reset table_big level 1, reset chap_big level 1, reset1
Lowapp Alwbox restart evenap:A1app_big level 1, resetA figure_ap level 1, reset
table_ap level 1, reset figure level 1, reset Figure 1. table level 1, reset Table 1.
these restarts oddbox reset: 1evenbox reset: 1must be in the header frame of
chapter 1. a:ebx, l 1 resetA a:obx:l 1, resetA a:bigbx level 1 resetA a:ftr level 1 resetA
c:ebx, l 1 reset1 c:obx:l 1, reset1 c:bigbx level 1 reset1 c:ftr level 1 reset1
Reminders for autonumbers that need to be restarted manually (first instance will
always be 4) let_in level 1: A. B. C. letter level 1:A.B.C. num level 1: 1. 2. 3.
num_in level 1: 1. 2. 3. rom_in level 1: I. II. III. roman level 1: I. II. III. steps level 1:
1. 2. 3.
1-1
GFK-0787B
Chapter 1 Introduction
Genius Modular Redundancy (GMR ) has been developed by GE Fanuc Automation and Silvertech
Limited of the United Kingdom. Silvertech has many years experience applying GE Fanuc products to
high-integrity safety system applications such as Emergency Shutdown and Fire & Gas Detection in the
petrochemical / oil and gas industries. They have captured this expertise in the GMR system software.
GMR is a high-reliability, high-availability redundancy system that provides a scalable solution for many
types of redundancy applications, including critical TMR (Triple Modular Redundancy) applications.
TÜV has certified GMR for classification to these requirements: triplex Class 5, duplex Class 4 and 5,
and simplex Class 4 according to the DIN V19250/DIN V VDE 081 standards. For use of the GMR
system in a TÜV approved safety critical installation, refer to information in Appendix A.
The GMR system is based on standard, off-the-shelf hardware. It utilizes field-proven Series 90-70
PLC and Genius I/O products. Enhancements have been incorporated into the standard PLC CPU,
bus controller, and several Genius I/O blocks specifically for use in GMR systems. These enhanced
products, together with GMR system software, provide input voting by the PLCs, output voting,
support for both discrete and analog I/O, automatic testing of discrete inputs and outputs, and
extensive fault-monitoring capabilities for the application program.
A basic GMR system consists of groups of Genius blocks gathering data from multiple or single
sensors, multiple PLCs running the same application program, and groups of Genius blocks
controlling shared output loads. Communications between the blocks and PLCs and among the
PLCs is provided by the Genius bus.
Triple Input Sensors
Triple Genius Busses
Triple PLCs
Load
GMR provides great configuration flexibility. A system can include 1, 2, or 3 PLCs. There can be just one
I/O subsystem, as represented above, or more than one. Each I/O subsystem can include 1, 2, or 3 busses.
A bus can serve up to a total of 32 devices (I/O blocks, PLCs, and a Hand-held Monitor). The system can
include both non-redundant I/O blocks and individual non-redundant points on redundant blocks.