Rockwell Automation Publication 193-UM012B-EN-P - June 2011 17
Chapter 2
When the Underload Warning conditions are satisfied, the following will occur:
• Bit 3 in Parameter 4, Wa r n i n g S t a t u s , will go to “1”
• Bit 1 of Parameter 10, Device Status, will go to “1”
Communication Fault
Protection
A disruption of the communication link between the E1 Plus EtherNet/IP
Module and a EtherNet/IP network can result in the loss of application control
and/or critical process diagnostic data. Rapid communication fault detection
helps minimize potential damage due to uncontrolled or unmonitored
applications.
Comm Fault Warning
The E1 Plus EtherNet/IP Module will indicate a Comm Fault warning if:
• No warning currently exists
• Comm Fault Warning is enabled
• The EtherNet/IP Module experiences a loss of communication
When the Comm Fault warning conditions are satisfied, the following will occur:
• The Network Status LED will blink red or become solid red
• Bit 5 in Parameter 4, Wa r n i n g S t a t u s , will go to “1”
• Bit 1 of Parameter 10, Device Status, will go to “1”
Communication Idle
Protection
When a programmable controller is placed into the program mode, the execution
of its ladder program is suspended, and any connected networks go to an idle
state. If inadvertent, this can result in the loss of application control and/or
critical process diagnostic data. Rapid communication idle detection helps
minimize the potential damage due to uncontrolled or unmonitored
applications.
Comm Idle Warning
The E1 Plus EtherNet/IP Module will indicate a Comm Idle warning if:
The Underload Warning function does not include a time delay
feature. Once the UL Inhibit Time has expired, the Underload warning
indication is instantaneous.
The Comm Fault State of OUT A is defined by Parameter 36 (OUTA En
FltState) and parameter 37 (OUTA En FltValue).
