
B–62075E/04
2. HARDWARE
148
(4)LED display
j :Not lit J :Lit L : Blinking
STATUS LEDs are green. ALARM LEDs are red.
1. LED display transition when the power is turned on
(STATUS LED)
No. LED display NC status
1 STATUS jjjj Power–off
2 STATUS JJJJ Initial state immediately after power–on
3 STATUS JjjJ State in which the sub–CPU software is to be acti-
vated
4 STATUS jjjJ Beginning of the activation of the sub–CPU soft-
ware
5 STATUS JJJj Beginning of the sub–CPU local RAM test
6 STATUS jJJj End of the sub–CPU local RAM test
7 STATUS JjJj End of initialization of a custom LSI chip
8 STATUS jjJj Beginning of the sub–CPU’s internal processing
9 STATUS JJjj Waiting for the processing by the main CPU (1)
10 STATUS jJjJ Waiting for the processing by the main CPU (2)
11 STATUS Jjjj Normal state. The power–on sequence has en-
ded.
2. LED display when an error occurs (STATUS LED)
No. LED display NC status
1 STATUS LjLL An error occurred in the local RAM of the sub–
CPU.
16 STATUS jJJJ A system error occurred.
3. LED display when an error occurs (ALARM LED)
No. LED display NC status
1 ALARM Jjj The sub–CPU has not started.
2 ALARM jJj SYSFAIL (fault in a module on the F–bus)
occurred.
3 ALARM JJj A servo alarm occurred.
4 ALARM jjJ SYSEMG (NMI in a module on the F–bus)
occurred.
5 ALARM JjJ An ABC alarm (fault in the peripheral bus,
FANUC bus) occurred.
6 ALARM jJJ A parity alarm occurred in the DRAM module.
7 ALARM JJJ A parity alarm occurred in the SRAM mounted on
the sub–CPU.