GE 90-30 PLC Series Installation And Hardware Manual page 185

complex systems can also be developed, with dual CPUs and one or more additional CPUs for data
monitoring.
Number of Genius Bus Controllers
Up to eight Genius Bus Controllers or Enhanced Genius Communications Modules can be included
in a Series 90-30 PLC system that has release 5.0 or later CPU firmware. A GBC cannot be
installed in a system with a GCM.
The I/O devices on a bus may be Genius I/O blocks, or standard Series 90-70 I/O modules in one or
more remote drops. The total number of I/O circuits that can be served by one Genius bus depends
on the types of I/O devices that are used and the memory available in the CPU.
Many Genius I/O blocks have both inputs and outputs on the same block. Blocks configured in the
programming software as having both inputs and outputs occupy the identical number of references
in both %I and %Q memory, regardless of the block's software configuration. Unused references
cannot be assigned to other inputs or outputs, and should not be used in the application program.
Status LEDs
The LEDs on the front of the GBC indicate its operating status and should be on during normal
operation.
OK
COM
Compatibility
Specific equipment or software versions required for compatibility with the GBC module are listed
below.
Series 90-30 PLC
CPU: The GBC module can be used with CPU models: IC693CPU311K, 321K, 331L or later, or
any version of the IC693CPU313, 323, 340, 341, 350, 351, 352, 360, 363, and 364. The CPU
firmware must be release 5.0 or later.
Logicmaster 90-30 version 5.0 (IC641SWP301L, 304J, 306F, 307F), VersaPro, or
Logic Developer-PLC software is required.
Series Six PLC
To exchange global data with a Genius Bus Controller, the Series Six Bus Controller must be
catalog number IC660CBB902F/903F (firmware version 1.5), or later.
GFK-0356Q Chapter 8 Option Modules
Shows the status of the GBC module. This LED turns on after power up diagnostics are
completed.
Shows the status of the Genius communications bus. This LED is on steadily when the bus
is operating properly. It blinks for intermittent bus errors and is off for a failed bus. It is
also off when no configuration has been received from the PLC CPU.
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