Rockwell Automation 1756-L6x_L7x ControlLogix System User Manual - Manual (Page 197)

Rockwell Automation Publication 1756-UM001O-EN-P - October 2014 197
Troubleshoot the Module Appendix A
I/O Indicator
The I/O indicator shows the status of I/O modules in the project of the
controller.
FORCE Indicator
The FORCE indicator shows if I/O forces are active or enabled.
RS232 Indicator
The RS232 indicator shows if the serial port is in use.
Table 57 - I/O Indicator
State Description
Off Either of the following is true:
• There are no devices are in the I/O configuration of the controller. If needed, add the required
devices to the I/O configuration of the controller.
• The controller does not contain a project (controller memory is empty). If prepared, download
the project to the controller.
Solid green The controller is communicating with the devices in its I/O configuration.
Flashing green One or more devices in the I/O configuration of the controller are not responding. For more
information, go online with the Logix Designer application to check the I/O configuration of the
controller.
Flashing red A chassis fault exists. Troubleshoot the chassis and replace it if necessary.
Table 58 - FORCE Indicator
State Description
Off Either of the following is true:
• No tags contain I/O force values.
• I/O forces are inactive (disabled).
Steady amber I/O forces are active (enabled) though I/O force values and can be configured.
Use caution if you install (add) a force. If you install (add) a force, it immediately takes
effect.
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.
Use caution if you enable I/O forces. If you enable I/O forces, all existing I/O forces also
take effect.
Table 59 - RS232 Status Indicator
State Description
Off There is no serial connection activity.
Flashing green There is serial connection activity.