GE 90-30 PLC Series Installation And Hardware Manual page 186

8
Genius Hand-Held Monitor
The Genius Hand-Held Monitor can be used to display the GBC bus address, its software version,
and the Series Six register address configured for global data. HHM version IC660HHM501H
(revision 4.5) or later is required. There is no Hand-Held Monitor connector on the GBC module,
but a Hand-Held Monitor can communicate with the GBC while connected to any other device on
the bus. Optionally, an additional HHM mating connector can be installed on the bus near the
GBC.
Hand-Held Programmer
The GBC can be configured using a Series 90-30 Hand-Held Programmer (IC693PRG300).
Genius I/O Blocks
Genius I/O blocks can be present on the same bus as the GBC. However, because the Bus
Controller is not compatible with older phase A blocks, they should not be installed on the same
bus.
Genius Bus
The Genius bus is a shielded twisted-pair wire, daisy-chained between devices, and terminated at
both ends. Proper cable selection is critical to successful operation of the system. Suitable cable
types are listed in GEK-90486-1, the Genius I/O System and Communications User's Manual.
Diagnostics
Genius blocks and other devices on the bus automatically report faults, alarms and certain other
predefined conditions to the PLC.
INPUTS AND FAULT MESSAGE
FROM BLOCK 3
GBC
1 4
2 3
TOKEN
F F
F
FAULT
Only one diagnostic message can be sent during any bus scan. If a fault message has already been
sent (by another device) during that scan, a device saves its own diagnostic message until the next
available bus scan. For example, if the communications token is currently at device 3, and faults
occur at devices 3 and 4 at the same time, device 3 can send its diagnostic message if another
message has not already been sent. Device 4 must wait at least one more bus scan to send its
diagnostic message.
The GBC stores any diagnostic messages it receives. They are read automatically by the Series 90-
30 CPU. Faults can then be displayed in the fault table using the programming software. A Genius
Hand-held Monitor must be used to clear the faults from the fault table.
8-8 Series 90-30 PLC Installation and Hardware Manual – August 2002 GFK-0356Q