Rockwell Automation 1734-ADNX POINT I/O DeviceNet Adpater User Manual - Manual (Page 25)

Publication 1734-UM002C-EN-P - July 2003
What is the 1734-ADN(X) Adapter? 2-5
Remove and Reinsert Modules on the Backplane
POINT I/O modules can easily be removed and reinserted on the
1734-ADN(X) backplane. If the removal and reinsertion is not done
with caution, you can affect the adapter’s operations and,
consequently, the entire POINT I/O application.
If you must remove and reinsert modules, we recommend the
following:
• Do not move I/O modules to different locations on the DIN rail
after they have been installed and configured.
• Always place modules with the matching Removable Terminal
Block.
• If adjacent modules (i.e., 2 or more) are removed from the
backplane, replace all of them before attempting to operate the
POINT I/O system. Input data will hold last state until all
previously-removed modules are replaced.
– If adjacent modules are removed and all but one is returned,
the adapter cannot verify the location of the returned
modules. For example, if modules are removed from nodes 3
and 4 and only the module from node 4 is returned, the
adapter cannot verify the location. In this case, the adapter
alerts you (via RSNetWorx for DeviceNet) that it cannot verify
the presence of modules in the affected locations. I/O data
will not be exchanged with this node until both modules have
been reinserted.
– If modules of different types are removed and returned to
the wrong locations, the adapter identifies the returned
modules and alerts you (via RSNetWorx for DeviceNet) that
the error has occurred and must be corrected.
IMPORTANT
The 1734-ADN(X) can only detect the location of
POINT I/O modules residing on the 1734-ADN(X)
backplane. It is the user’s responsibility to maintain
all non-backplane devices, including POINT I/O
modules attached to the Subnet with a 1734-PDN
adapter.