
B–63525EN/02
4. STAND–ALONE TYPE i SERIES HARDWARE
287
D 7–segment LED display when a system alarm occurs
If a system alarm occurs, a number blinks as shown below, depending
on the system alarm number.
7–segment
LED
System
alarm num-
ber
System alarm type
0 900 to 909 ROM parity alarm.
System ROM parity stored in FROM
1 910 to 919 SRAM or DRAM parity alarm
2 920 to 929 Servo alarm
3 930 to 949 CPU interrupt or SRAM ECC error
5 950 to 959 PMC system alarm
7 970 to 979 Bus error or non–maskable interrupt
8 Others Other system alarms
NOTE
If any of the system alarms occurs, the hardware may be
defective.