Specifications

ControlLogix™ Controller and Memory Board 35
Publication
1756-IN101H-EN-P - June 2003
Interpret
C
ontroller LEDs
Front Panel: Indicator: Color: Description:
RUN off The controller is in Program or Test mode.
solid green The controller is in Run mode.
I/O off Either:
• There are no devices in the I/O configuration of the controller. • The controller does not contain a project (controller memory is empty).
solid green The controller is communicating with all the devices in its I/O configuration. flashing green One or more devices in the I/O configuration of the controller are not responding. flashing red The chassis is bad. Replace the chassis.
FORCE off • No tags contain I/O force values.
• I/O forces are inactive (disabled).
solid amber • I/O forces are active (enabled).
• I/O force values may or may not exist.
flashing amber
One or more input or output addresses have been forced to an On or Off state, but the forces have not been enabled.
RS232 off There is no activity.
solid green Data is being received or transmitted