Installation guide

Commissioning
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890USE17100 September 2003
Mandatory
Module
Considerations
If the island contains any I/O modules that have been configured as mandatory, you
need to be aware of how the island will behave in the event of a reset or power cycle.
Suppose you have an island that comprises a NIM, a PDM and six I/O modules. The
modules at address locations 1, 2, 3, 5 and 6 are optional, and the module at location
4 is mandatory.
O optional
M mandatory
If the mandatory module in location 4 is removed, all the modules will go into pre-
operational mode and the island will not function. However, there are also some
special circumstances involving the hot swapping of optional modules when a
mandatory module is present on the island.
Note: Using the Advantys configuration software you can disable the reset button.
In this situation pressing the reset button will not effect the configuration. If the reset
button is active, pressing it will erase the existing configuration.
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MOOO O O