Rockwell Automation 193-EC1_2_3_5, 193-ECPM,592-EC1_2_3_5 E3 and E3 Plus Solid-State Overload Relay User Manual - Manual (Page 65)

Rockwell Automation Publication 193-UM002I-EN-P - December 2011 65
Protective Trip & Warning Functions Chapter 3
Comm Fault Warning
The E3 Overload Relay will indicate a Comm Fault warning if:
• no warning currently exists,
• Comm Fault Warning is enabled, and
• the relay experiences a loss of communication.
When the Comm Fault warning conditions are satisfied, the:
• Network Status LED will blink red or become solid red,
• TRIP/WARN LED will flash an amber 10-blink pattern,
• bit 9 in Parameter 15, Warning Status, will set to “1”, and
• bit 1 of Parameter 21, Device Status, will set to “1”.
If a communication fault occurs and either Comm Fault Trip is not enabled or
the Pr FltState parameters are set to “Ignore”, the:
• Network Status LED will blink red or become solid red and
• outputs will be placed in their Comm Fault.
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 Trip
The E3 Overload Relay will trip with a Comm Idle indication if:
• no trip currently exists,
• Comm Idle protection is enabled, and
• the network controller that the E3 Overload Relay is communicating to is
placed to program mode.
If the relay trips on a Comm Idle, the:
• TRIP/WARN LED will flash a red 11-blink pattern,
IMPORTANT The Comm Fault State of OUT A and OUT B is defined by:
• OUTA Dn FltState, Parameter 67
• OUTA Dn FltValue, Parameter 68
• OUTB Dn FltState, Parameter 73
• OUTB Dn FltValue, Parameter 74