Rockwell Automation 193-EDN E1Plus Overload Relays - DeviceNet Module - Manual (Page 15)

Publication 193-UM006A-EN-P – October 2005
Protection Functions 2-5
Underload Warning
The following parameters are available for configuring the DeviceNet
Module's underload warning performance:
• Parameter 22, UL Inhibit Time, allows the installer to inhibit an
underload indication from occurring during the motor starting
sequence. It is adjustable from 0…250 seconds.
• Parameter 23, UL Warn Level, allows the installer to define the current at
which the DeviceNet Module will indicate a warning. It is
user-adjustable from 30…100% of the FLA dial setting.
The DeviceNet Module will immediately indicate an Underload warning if:
• No warning currently exists
• Underload Warning is enabled
• UL Inhibit Time has expired
• The motor current is less than the UL Warn Level
When the Underload Warning conditions are satisfied, the following will
occur:
• Bit 3 in Parameter 4, Warning Status, 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 DeviceNet
Module and a DeviceNet 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 DeviceNet Module will indicate a Comm Fault warning if:
• No warning currently exists
• Comm Fault Warning is enabled
• The DeviceNet Module experiences a loss of communication
IMPORTANT
The Underload Warning function does not include a time
delay feature. Once the UL Inhibit Time has expired, the
Underload warning indication is instantaneous.