Emerson PACSystems RSTi-EP - Page 7

4 PACSystems™ RSTi-EP EPSCPE115 Standalone CPU Quick Start Guide GFK-3039C
Module Status Indicators
As shown in Figure 2, there are three LEDs
located at the bottom right of the front panel,
just below the Membrane Push Button.
The following tables describe the behavior of
each module LED:
LED
LED State
Operating State (at Power-Up)
RUN
Blinking; All
other LEDs off
This LED indicates the status of PLC during powering
up. It starts blinking 6 seconds after applying power to
the PLC and remains in this state for up to 15 seconds.
After this all LEDs turn off and will remain in this state
until PLC is ready.
LED
LED State
Operating State (after Power-Up)
OK
On Green
PLC has passed its power-up diagnostics and is
functioning properly.
Off
Power is not applied, or PLC has a problem.
Blinking; All
other LEDs
off
PLC in STOP/Halt state; possible watchdog timer fault. If
the programmer cannot connect, cycle power and refer
to the fault tables. Refer to Section 0. Troubleshooting
FAQs for more details.
RUN
On Green
PLC is in RUN mode.
Off
PLC is in STOP mode.
Figure 2: LED Indicators