About the Adapter | |
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•A correct POINT I/O system does not have any empty terminal bases.
•After you cycle power, the adapter will not run any I/O until the number of modules comprising the chassis equals the stored chassis size.
–Because the adapter cannot detect empty terminal bases, it cannot assume any safe operation until there is a match between the number of modules indicating their presence in the chassis and what the adapter has saved in
–Actual module identification (such as, electronic keying) is done when connection establishment requests are received from the controller or controllers.
•A module removed under power does not disrupt operation of the other I/O modules.
–When you remove a module, the adapter determines what changed.
–Whenever you remove a module with an active connection from the POINT I/O system, the adapter indicates this by flashing the POINTBus Status LED red and reports a minor recoverable fault.
•If more than one contiguous module is removed under power, connections to all modules in the contiguous missing module set are disallowed until all modules are replaced. Because the adapter cannot detect an empty base, it does not know the physical positioning of the modules until all the missing modules are replaced.
•If a module separating two sets of contiguous missing modules is removed, the two sets merge into a single set. All the modules must be replaced before connections are permitted to any module in the set.
•If modules of different types are removed and returned to the wrong locations, attempts to connect to these modules will fail during verification of the electronic ID (providing that keying has not been disabled).
•If modules of the same type are removed and returned to the wrong locations, they accept connections from the controller or controllers and reconfigure with the correct data once they pass their electronic keying check.
•These removal and return situations exist whether the system is under power or not. If the system is under power, the situation arises immediately. If the system is not under power, the situation arises in the next power cycle.
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