Rockwell Automation Publication 193-UM015E-EN-P - October 2015 431
Protective Trip and Warning Functions Chapter 6
• Bit 1 in Device Status 0 (Parameter 20) sets to 1
• Any relay outputs configured as a Warning Alarm closes
Operator Station Trip
The E300 relay provides the capability to plug and play its optional operator
stations. The operator station protection feature trips the E300 relay when you
press the red O (stop) button. This feature is a failsafe mechanism to allow you to
de-energize a contactor coil anytime the red O (stop) button is pressed.
Operator Station Trip should be disabled when an operator station is being used
to send start and stop signals to an automation control system.
The E300 relay trips with an operator station trip indication if:
• No trip currently exists
• Operator Station Trip is enabled
• You press the red O button on an operator station
If
the E300 relay trips on an operator station trip, the following occurs:
• The TRIP/WARN LED flashes a red 3-long / 4-short blink pattern
• Bit 3 in C
ontrol Trip Status (Parameter 7) sets to 1
• Bit 0 in Device Status 0 (Parameter 20) sets to 1
• Any relay outputs configured as a Trip Relay open
• Any relay outputs configured as a Control Relay open
• Any relay outputs configured as a Trip Alarm close
• Any relay outputs configured as a Normal Relay are placed in their
P
rote
ction Fault state (if so programmed)
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