Alarm, fault and system messages
11.3 Diagnostics by evaluating the POWER, ETHERNET, STATE/SF LEDs
SIMATIC MV420 / SIMATIC MV440
346 Operating Instructions, 04/2013, A5E02371045-06
11.3 Diagnostics by evaluating the POWER, ETHERNET, STATE/SF
LEDs
LED labeling Meaning How to remedy the problem
• GREEN, flashing:
Signals the startup phase after turning
the reader on.
Wait until this is completed and the reader is operational.
POWER
• GREEN, lit permanently:
Reader is ready for operation
No error.
• Permanently off:
No Ethernet connection to the reader.
• Check the connection to the Ethernet cable.
• Check whether the connected switch or other
communications partner is operational.
• Check or replace the Ethernet cable.
• GREEN, permanently on:
An Ethernet connection exists without
data traffic.
To start the user interface of the reader, you also require a
valid network configuration for TCP/IP. Here, you can, for
example, use the Primary Setup Tool to create a valid
network configuration for TCP/IP.
ETHERNET
• GREEN flashing:
The reader is exchanging data.
No error.
• Off permanently:
The reader is in "Stop" mode (no error)
No error.
• GREEN on permanently:
The reader is in RUN mode (no error)
No error.
• RED, lit constantly:
The reader is in the "Group error" status
Possible cause when working with onboard
PROFINET IO:
1. Bus error (no physical connection to a
subnet / switch).
2. Wrong transmission speed,
Full duplex transmission is not enabled.
Start the user interface to display the error message. Follow
the suggested remedies, see section "Error messages
(Page 334)".
STATE/SF
• RED, flashing
When using onboard PROFINET IO:
1. Bus communication is interrupted.
2. The IP address is incorrect.
3. Bad configuration.
4. Bad parameter assignment.
5. Bad or missing device name.
6. I/O controller does not exist / turned off.
• Check whether the IP address or device name occurs
more than once in the network.
• Check the settings of the I/O controller.
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