
B–62075E/04
2. HARDWARE
154
(4)LED display
The STATUS LEDs in the front upper section of the option board are
used for two independent functions as shown in the figure on the
below.
j :Off J :Lit Ll :Flashing z : Don’t care
LL means both of LED are flashing at the same time.
Ll means both of LED are flashing alternately.
1234
Status
display
for the
graphic
display
Status
display
communi–
cation
function
STATUS
ALRAM
(a) LED display of graphic display function
1. LED display transition when the power is turned on
No. LED display NC status
1 STATUSJJJJ
ALARM Jjj
Startup status immediately after the power is
turned on.
2 STATUSjJzz
ALARM jjj
Waiting for setting each processor of ID in the
system.
3 STATUSJjzz
ALARM jjj
Waiting for initialization of each processor in the
system.
4 STATUSjjzz
ALARM jjj
The initialization of graphic display function is
completed and on executing.
2. LED display when an error occurs
No. LED display NC status
1 STATUSJjzz
ALARM Jjj
ROM parity error occurs.
Change graphic ROM.
2 STATUSJjzz
ALARM Jjj
RAM parity error occurs.
Change option 1 board.
3 STATUSjLzz
ALARM Jjj
Command error occurs.
Change option 1 board.
4 STATUSLLzz
ALARM Jjj
NMI from other boards.
Check LED display of other boards.
5 STATUSLjzz
ALARM Jjj
Bus error (Wrong memory access) occurs.
Change option 1 board.
6 STATUSLlzz
ALARM Jjj
Division error occurs.
Change option 1 board.
7 STATUSJLzz
ALARM Jjj
Incorrect interruption occurs.
Change option 1 board.