124 Rockwell Automation Publication 825-UM004D-EN-P - November 2012
Chapter 9 825-PDN DeviceNet Communication Card
Figure 44 - Scanner Path
DeviceLogix
DeviceLogix is a stand-alone Boolean program, which resides within the
825-PDN DeviceNet Communication Card. The program is embedded
in the product software so there is no additional module required to use
this technology, however RSNetWorx for DeviceNet is required to program
the device.
In addition to the actual programming, DeviceLogix can be configured to
operate under specific situations. It is important to note that the DeviceLogix
program only runs if the logic has been enabled. This can be done within the
Logic Editor of RSNetWorx. The operation configuration is accomplished
by setting the Network Override and Communication Override parameter.
The following information describes the varying levels of operation:
• I
f both overrides are disabled and the logic is enabled, the only time
De
viceLogix runs is if there is an active I/O connection with a master, i.e.,
the ma
ster is in Run mode. At all other times, DeviceLogix is running the
logic, but does not control the status of the outputs.
• If the Network Override is enabled and the logic is enabled, then
De
viceLogix controls the state of the outputs when the PLC is in Run
mode and if a network fault such as Duplicate MAC ID or Module Bus
off condition occurs.
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