Rockwell Automation 1734-XXXX POINT I/O and ArmorPOINT I/O DeviceLogix User Manual - Manual (Page 62)

Publication 1734-UM015A-EN-E - November 2009
60 Configuring POINT I/O and ArmorPOINT I/O DeviceLogix modules using RSNetworx for DeviceNet
In this example, the ZIP Security Key is mapped to Network Output Word 3.
Any module receiving this data should verify the constant value.
For example:
The ZIP Security Key constant is added using the ellipses button of the NEQ
function block. This output can be used to condition the execution of other
function blocks using the Enable input.
Note that there could be an "unsigned value to signed value conversion" when
the ZIP Security Key is displayed in the Logic Editor, which leads to a
mismatch of displayed value. However, the value is consistent in HEX format.