The
system words %SW100 and %SW101 count the modifications. The embedded rack viewer uses these words to retrieve the latest configuration in the CPU, and synchronizes the CPU and the EIO scanner service.
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%SW100 increments each time a CCOTF modification is performed on a local rack.
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%SW101 increments each time a CCOTF modification is performed on an . A modification performed on a redundant Quantum S908 remote drop counts double therefore %SW101 increments twice.
NOTE: When a byte reaches its maximum value of 255, the counter resets to 1.
The CCOTF status word is
%SW66.
The connection status of the added module is significant only when %SW66 does not indicate that CCOTF is in progress.
The DDDT of the CPU scanner service and the BMENOC0301/11 Ethernet communication module contain the
freshness bit.
Health bit storage:
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Local and RIO drop health bits are stored in the CPU/BMENOC0301/11 scanner service .
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Module health bits are stored in the BM•CRA312•0 EIO adapter (one bit per module, up to 32 modules).
When you configure a module added to a local rack/RIO drop, the following bits are set to 0:
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health bit
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%S119, bit signaling a detected error in an I/O module on the local rack
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%S117, bit signaling a detected error in an I/O module on an RIO drop
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When a parameter is modified, the module is restarted, and the health bit is set to 0 during several ms. The bits %S10, %S117, and %S119 are set to 0.
NOTE: When adding, deleting, or modifying parameters in one module, the other modules available in the system are not impacted, and their status bits remain at 1.
Refer to the
%SW66 topic for a list of processing status codes for local I/O and RIO.
