
B–62835EN/01
2. HARDWARE
89
If an alarm occurred, an alarm message is usually displayed on the DPL
CRT, PDP, LCD, or handy operator’s panel screen. However, it is
possible that no alarm appears, if the display function is in trouble.
In such a case, the alarm occurrence are displayed by LED on the
Controller.
LED
No. Color
u
u
S0 Green No alarm
Blinks during automat-
ic operation.
Remains on or off
while automatic opera-
tion is not being per-
formed.
S1 Red Lights with all alarms An alarm No. is displayed in the
DPL/MDI or CRT/MDI at the same
time.
Make a corrective measure by the
alarm No.
EN Green This show to turn on
power.
WD Red Watch dog alarm When display unit is connected at
alarm is occured, it may be dis-
plaied the alarm number.
Do some disposal of the alarm.
If the all–clear operation does not
release the alarm, replace the
base PCB
2.4
LED DISPLAY/
SETTING AND
MODULE
CONFIGURATION OF
UNIT
2.4.1
LED Display of Control
Unit