210 Rockwell Automation Publication 1756-UM001M-EN-P - February 2012
Appendix A Status Indicators
RS232 Indicator
The RS232 indicator shows if the serial port is in use.
BAT Indicator
The BAT indicator shows the charge of the battery and if the program is being
saved.
OK Indicator
The OK indicator shows the state of the controller.
Table 65 - RS232 Status Indicator
State Description
Off There is no serial connection activity.
Table 66 - BAT Indicator
State Controller
Series
Description
Off N/A The controller is able to support memory.
Solid green A The series A controllers do not use this state.
B The series B controller is conducting a save of the program to internal-nonvolatile
memory during a controller power down.
Solid red N/A Either of the following is true:
• A battery is not installed.
• The battery is 95% discharged and should be replaced.
Note that if the indicator is solid red before a power down, the indicator remains red
while the controller is completing a program save to internal-nonvolatile memory.
Table 67 - OK Indicator
State Description
Off No power is applied to the controller.
Flashing red Either of the following is true:
• It is a new controller, just out of the box, and it requires a firmware upgrade.
• It is a previously-used or in-use controller and a major fault has occurred.
• The controller is experiencing a non-recoverable, major fault.
Steady red • A nonrecoverable major fault occurred and the program was cleared from memory.
• The controller is completely powered up, in diagnostics mode.
• The controller is powered, but inoperable.
Steady green The controller is operating normally.
Flashing green The controller is storing or loading a project to or from nonvolatile memory.
If using a CompactFlash card, leave the card in the controller until the OK status indicator
turns solid green.
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