Troubleshooting; Step-By-Step Troubleshooting; Alarm Word And Warning Word - Danfoss MCA 122 Modbus TCP Operating Instructions Manual

Troubleshooting

6 Troubleshooting

6.1 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 shows a constant green light.
State LED
No power
Device operational Green:
Standby Green:
Minor fault Red:
Major fault Red:
Red:
Self test
Green:
Yellow
No IP address
Wink Yellow
Table 6.1 MS: Module Status
State
No IP-address (no power)
Connected Green:
Duplicate IP Red:
Red:
Self test
Green
Device has been winked Yellow
Link present at 10 Mbps Yellow
Table 6.2 NS1+NS2: Network Status (one per port)
Check: Link Status
The status of the Ethernet link cannot be directly identified
with the LEDs.
Use 12-10 Link Status, to verify presents of the link.
Use 12-11 Link Duration, to verify that the link is steady
present.
The parameter shows 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 (refer to
3.1.1 IP Settings) in 12-01 IP Address. If the option has
identified a duplicate IP Address NS LEDs lights steady red.
If the option is set up for BOOTP or DHCP, verify that a
BOOTP or DHCP server is connected in 12-04 DHCP Server.
MCA 122 Modbus TCP
Off
Solid green
Flashing green
Flashing red
Solid red
Flashing red/
green
Steady yellow
Flashing yellow
LED
Off
Solid green
Solid red
Flashing red/
green
Flashing yellow
Steady yellow
If no server is connected, the parameter shows:
000.000.000.000.

6.2 Alarm Word and Warning Word

Alarm word and warning word are shown in the display in
Hex format. If there is more than one warning or alarm, a
sum of all warnings or alarms is shown. Warning word and
alarm word are displayed in 16-90 Alarm Word to 16-95.
For more information on the individual alarms and
warnings, refer to the product relevant Design Guides.
®
MG90P202 - VLT is a protected Danfoss trademark
Description
The device is un-powered
The device is operational
The device needs commissioning
The device has detected a recoverable fault
The device has detected an un-recoverable
fault
The Modbus TCP option is in self-test mode
No IP address configured or obtained
Flash for 20 s
Description
No link present (or is un-powered)
Link present; but nor winked and no ACD
The IP-address assigned to the device is
already in use
The Modbus TCP option is in self-test mode
Flash for 20 s
Link present; but nor winked and no ACD
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