Publication 1734-UM011A-EN-P - February 2004
1-2 About the 1734-AENT Adapter
Important Adapter
Considerations
Before you begin using your 1734-AENT, please note the following important
considerations.
Set the Chassis Size
The 1734-AENT POINT I/O adapter for EtherNet/IP requires its chassis
size to be configured before any I/O connections can be made. The default
setting for the chassis size is 1 slot which represents the adapter by itself. You
must set the chassis size to a number equaling 1 slot for the adapter plus 1 slot
for each I/O module present in the adapter’s backplane (e.g., the adapter plus
4 I/O modules will use a chassis size of 5). The adapter stores this chassis size
setting in non-volatile storage. When the adapter’s non-volatile chassis size
does not match the actual number of modules present on its backplane, the
adapter will not make any I/O connections and the following error will occur.
Adapter replacement
It is important to note that during a connection request from the controller,
the chassis size setting for a 1734-AENT is not communicated to the adapter.
This chassis size must always be set using a separate operation. This includes
situations when an adapter is being replaced. The adapter will not make any
I/O connections until it has been configured with the appropriate chassis size.
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