DESCRIPTION AND OPERATION
SLAVE EXPANDER BUS
2 - 4
I-E96-301B
®
Switch Settings
The IMASI03 has one 8-position DIP switch to select the slave
address for the slave expander bus. This switch also selects
built-in diagnostics for a stand-alone test.
On-Board Indicators
The IMASI03 has one red/green LED indicator which shows
the operating status. The LED will:
•
Flash red on power-up.
•
Remain off after passing on board diagnostics until the
IMASI03 is configured by the MFP.
•
Show solid green after the master MFP downloads configu-
ration data.
•
Show solid green during normal running.
•
Blink green when the MFP which configured the IMASI03
enters configure mode from execute mode.
•
Blink green if slave expander bus communication is lost (if
the MFP is removed).
•
Show solid red if a fatal failure of the IMASI03 module
occurs. For example, if power up diagnostics fail.
•
Show solid red for a power fail interrupt (PFI).
•
Show pass/fail of diagnostic routines when in diagnostic
mode (refer to
).
SLAVE EXPANDER BUS
The INFI 90 slave expander bus is a high speed synchronous
parallel bus. It provides a path between MFP master modules
and slave modules. The master module sends control functions
to the IMASI03, and the IMASI03 provides input data to the
master module. The P2 card edge of the IMASI03 and master
module connect to the bus.
The slave expander bus is 12 parallel signal lines located on
the module mounting unit (MMU) backplane. A 12-position
dipshunt placed in a socket on the MMU backplane connects
the bus between the master and slave modules. Cable assem-
blies can extend the bus to eight MMUs.
A master module and its slaves form a subsystem within a Pro-
cess Control Unit (PCU). The slave expander bus between mas-
ter/slave subsystems must be separated. Leaving a dipshunt
