User Manual

64 Rockwell Automation Publication 193-UM002I-EN-P - December 2011
Chapter 3 Protective Trip & Warning Functions
• TRIP/WARN LED will flash an amber 9-blink pattern,
• bit 8 in Warning Status, Parameter 15, will set to “1”, and
• bit 1 in Device Status, Parameter 21, will set to “1”.
CI Warn Level, Parameter 52, allows the installer to define the percent current
imbalance at which the E3 Overload Relay will indicate a warning. It is user-
adjustable from 10…100%.
Communication Fault
Protection
A disruption of the communication link between the E3 Overload Relay 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 Trip
The E3 Overload Relay will trip with a Comm Fault indication if:
• no trip currently exists,
• Comm Fault protection is enabled, and
• the E3 Overload Relay experiences a loss of communication.
If the relay trips on a Comm Fault, the:
• Network Status LED will blink red or become solid red
• TRIP/WARN LED will flash a red 10-blink pattern
• bit 9 in Trip Status, Parameter 14, will set to “1”
• bit 0 in Device Status, Parameter 21, will set to “1”
• Trip Relay contacts will open, and
• outputs will be placed in their Protection Fault State (if so programmed).
IMPORTANT
The Current Imbalance Warning function does not include a time delay
feature. Once the CI Inhibit Time has expired, The CI warning indication is
instantaneous.
IMPORTANT
The Protection Fault State of OUT A and OUT B is defined by:
• OUTA Pr FltState, Parameter 65
• OUTA Pr FltValue, Parameter 66
• OUTB Pr FltState, Parameter 71
• OUTB Pr FltValue, Parameter 72