SECTION 4 LED INDICATIONS
The LEDs on the CPU indicate the following:
• RUN (D1) = The CPU is operating (Blue)
• D2, and D3 = Alarms (Red)
• D4 = Flash access indication (Red)
• D5 = Boot status (Red)
• Refer to Program 90-10: System Alarm Setup for details on assigning alarm LEDs.
Table 4-2 CPU LED Indications on page 4-12 provides a list of each LED and associated operation
and status indications. Refer to Figure 4-17 Inserting the CF card on page 4-10 for the location of the
LEDs on the CPU.
Table 4-2 CPU LED Indications
Status LED Indication
RUN (D1) D2 D3 D4 D5
System Operating Normally Blinking Off Off Off Off
System Operate Normal + File accessing Blinking Off Off Access
Blinking
Off
System Starting Up On Off Off Off Off
Boot is starting On Off Off Off Blinking
Initializing the disk or formatting Blinking Off Off Off Off
Reading System Program Blinking Off On Access
Blinking
Off
Reading Error of System Program Off On Off Off Off
System Initializing + DSP loading process On Off On Access
Blinking
Off
Initializing System Program Blinking Off On Access
Blinking
Off
Upgrading System Program (in the Flash Memory) Off Blinking Off Access
Blinking
Off
Batch file Error Off On On Off Off
Completed the System Program Upgrade Off Blinking Blinking Blinking Off
Security Tip Error Off Blinking Off Off Off
Error alarm (Major) occurred Blinking Blinking Off Off Off
Error alarm (Minor) occurred Blinking Blinking Off Off Off
Shutting Down Blinking Off Off Off Off
Power Off Off Off Off Off Off
SL1100 ISSUE 4.1 (R5.1)
4-12 Maintenance
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