Installation guide

Commissioning

890USE17100 September 2003 91

Do Not Hot Swap

Modules with

Different Model

Numbers

If an I/O module is removed from its base and then replaced by a module with a

different model number, the remaining modules on the island will continue to operate

but the new module will not be operational. The green RDY LED on the new module

will blink to indicate that it is in pre-operational mode, and an LED on the NIM will

indicate that a device mismatch has been detected.

If you choose to keep the module with a different model number in the base, you will

have to reconfigure the system to make it operational.

Do Not Reset the

Island Bus while

a Module is

Removed

If you push the RST button on the NIM while an I/O module is missing from the island

bus, the island will re-configure, and only the modules to the left of the missing one

will be operational.

For example, if an I/O module is removed from address location 4 of the island bus

as shown below:

and then the RST button on the NIM is pushed, the modules in locations 1, 2 and 3

will remain operational, and the modules to the right of the empty location will not be

detected.

The green RDY LED on the modules in address locations 5 and 6 will flash to

indicate that they are in pre-operational mode.

123 56

123 XX

RST