Troubleshooting
294 372 SPU 780 01EMAN May 2002
S901 Controller The I/O Module Health Status information consists of words that represent the
module health for channel pairs. Each word represents 2 channels. The words are
also divided into input modules and output modules. A single bit is used to repres ent
the Health Status of a single module.
If the slot is inhibited in the Traffic Cop then the bit will be a ’0’. If the slot contains
an input module then the bit will be a ’1’. This will not be the case if the
Communication Status Word 2/2 (183) indicates an error.
If the slot contains an output module and if the active light is on then this bit will be
a ’1’. If the active light is off then this bit will be a ’0’. It is common to set the status
indicator for an output slot to toggle between ’0’ and ’1’ when active and healthy.
The Upper byte contains the status of the lower channel number of the channe l pair
(for example, channel 1 for channel pair 1/2). The lower byte contains the status of
the higher channel number of the channel pair. Each byte represents the status of
slots 1 to 8 of the channel. The Most Significant Bit of the channel represents slot 1
and the Least Significant Bit shows the status of slot 8.
Status Word #012: Drop # 01/01 Rack # 1/5
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Plus these five w/QuantumSlot #1 through Slot #11 E-Series