GE Industrial Solutions AF-600 FP OPCMBTCP Modbus TCP Option - Manual (Page 48)

7 Troubleshooting
7.1 Troubleshooting
7.1.1 Step-by-step Troubleshooting
Check: LEDs
The option contains two LEDs to indicate the state of the device and the network. During normal operation the MS and at least one NS LED will show a constant
green light.
State LED Description
No power Off The device is un-powered
Device operational Green: Solid green The device is operational
Standby Green: Flashing green The device needs commissioning
Minor fault Red: Flashing red The device has detected a recoverable fault
Major fault Red: Solid red The device has detected an un-recoverable fault
Self test
Red:
Flashing red/green The Modbus TCP option is in self-test mode
Green:
No IP address Yellow Steady yellow No IP address configured or obtained
Wink Yellow Flashing yellow Flash for 20 seconds
Table 7.1: MS: Module Status
State LED Description
No IP-address (no power) Off No link present (or is un-powered)
Connected Green: Solid green
There is established (at least) one CIP connection to
the device
Duplicate IP Red: Solid red
The IP-address assigned to the device is already in
use
Self test
Red:
Flashing red/green The Modbus TCP option is in self-test mode
Green
Device has been winked Yellow Flashing yellow Flash for 20 seconds
Link present at 10 Mbps Yellow Steady yellow Link present; but nor winked and no ACD
Table 7.2: NS1 + NS2: Network Status (one per port)
Check: Link Status
The status of the Ethernet link cannot be directly identified by means of the LEDs.
Use par. EN-10, Link Status to verify presents of the link.
Use par. EN-11, Link Duration to verify that the link is steady present.
The parameter will show the duration of the present link, and preset to 00:00:00:00 if the link is broken.
Check: Cabling
In rare cases of cabling mis-configuration, the option might show the presents of a link, but no communication is running. Exchange the cable in doubt.
Check: IP Address
Verify that the option has a valid IP address (please refer to section: IP Settings) in par. EN-01, IP Address. If the option has identified a duplicate IP Address NS
LEDs will light steady red. If the option is set up for BOOTP or DHCP, verify that a BOOTP or DHCP server is connected in par. EN-04, DHCP Server. If no server is
connected, the parameter will show: 000.000.000.000.
Modbus TCP
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