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372 SPU 780 01EMAN May 2002 293
Module Health
S908 Controller Module Health Status information consists of up to 160 words. A single bit is used
to represent the Health Status of a single module. A binary ’1’ means that the module
is healthy. Each drop in the I/O sub system has five words allocated to contain I/O
module status. Each of these five words contains the I/O module status of a single
rack within the drop. The most significant bit (MSB) represents the status of the
module in slot 1. Slot 2 module status is represented by the bit to the immediate right
of the MSB.
A healthy I/O module must meet the following conditions:
The specified slot must be configured in the Traffic Cop.
The slot must contain the module specified in the Traffic Cop.
Valid communication must exist between the module and the interface.
Valid communication must exist between the interface module and the controller.
Note: If a module is configured in the Traffic Cop and active, then the bit will be 1.
WARNING
Upgrade Recommended
On systems using J890/J892s with PROM rev 1000, slot 1 will be the
LSB. J890/J892s with PROM revs greater than 1000 will appear as
previously described. The earlier J890/J892s should be upgraded as
they will be incompatible with any user programming that assumes slot
1 status to be the MSB.
Failure to follow this precaution can result in severe injury or
equipment damage.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Odd channel bits 1 through 8
Even channel bits 9 trough 16