GE GEFanuc Automation Programmable Control Products TCP/IP Ethernet Communications for the Series 90t-70 PLC GFK-1004B - Manual (Page 176)

6
6-5 GFK-1004B Chapter 6 Troubleshooting
The Power-Up State
When power is cycled on the Series 90-70 PLC, or whenever the Ethernet Interface is
restarted, power-up diagnostics run. Diagnostics running is indicated by the MODULE
OK LED blinking fast, while the other LEDs remain OFF. If the Ethernet Interface
detects an error in the hardware, it reports this error to the CPU, then shuts down. All
LEDs turn OFF if the Ethernet Interface fails a diagnostic test. If this happens, refer to
the PLC Fault Table for detailed information.
Note
The Restart/Load Pushbutton is not operable during the Ethernet
Interface diagnostic phase nor is the Station Manager active. The
Ethernet Interface is in diagnostic phase when the MODULE OK LED is
BLINKING and the ONLINE and STATUS OK LEDs remain OFF.
After diagnostics complete, both the MODULE OK LED and STATUS OK LED blink
slowly for 2-3 seconds. (The ONLINE LED is OFF during this time.) This LED sequence
identifies the time you may enter the Field Network Test State by entering an “F” or “f ”
at the Station Manager terminal. The table below shows the LED patterns for the
power-up diagnostics phase.
Table 6-2. Power-Up State
ББББББ
ББББББ
ББББББ
LED
БББББ
БББББ
БББББ
Running
Diagnostics
(15 sec)
БББББББ
БББББББ
БББББББ
Wait for Field
Network Test
(2-3 sec)
БББББББ
БББББББ
БББББББ
Wait for PLC &
CPU Handshake
(to 60 sec)
БББББ
БББББ
БББББ
Diagnostic
Failed
ББББББ
ББББББ
MODULE OK
БББББ
БББББ
Blink
БББББББ
БББББББ
Slow Blink
БББББББ
БББББББ
Slow Blink
БББББ
БББББ
OFF
ББББББ
ББББББ
ONLINE
БББББ
БББББ
OFF
БББББББ
БББББББ
OFF
БББББББ
БББББББ
OFF
БББББ
БББББ
OFF
ББББББ
ББББББ
STATUS OK
БББББ
БББББ
OFF
БББББББ
БББББББ
Slow Blink
БББББББ
БББББББ
OFF
БББББ
БББББ
OFF
The PLC Fault Table can be especially helpful in detailing faults that are detected in the
Power-Up State. In the Power-Up State, the Station Manager is not operational. The
Ethernet Interface has likely failed and is far less able to report such failures in detail.
See GFK-0265, Logicmaster 90 Programming Software Reference Manual for information on
the PLC Fault Table.
Note
If all LEDs go out after completing power-up diagnostics, then
power-up diagnostics has failed. Refer to the PLC fault table for more
information.
The Soft Switch Entry State
The Soft Switch Entry State is indicated by the MODULE OK LED blinking slowly (every 2
seconds) while the other LEDs remain OFF. The Soft Switch Entry state is automatically
entered when the Soft Switch data in the Ethernet Interface is invalid and has not been set
up by the Logicmaster 90-70 Configurator. The Soft Switch Entry state is also entered when
certain configuration faults that preclude full operation are detected. A limited subset of
Station Manager commands is provided in this state. Refer to Chapter 5, “Soft Switch Entry
Utility”, for further description of the Soft Switch entry state.