Siemens SIMATIC Ident Operating Instructions Manual page 28

Service and maintenance
5.1 LED status display on the RF120C
Table 5- 1
LED / colors
Lit yellow
flashing red
Note
LED colors when the module starts up
When the module starts up, all its LEDs are lit for a short time. Multicolored LEDs display a
color mixture. At this point in time, the color of the LEDs is not clear.
Display of the operating and communication status
The LEDs indicate the operating and communications status of the module according to the
following scheme:
Table 5- 2
(red / green)
Lit green
flashing green
flashing red
28
LEDs below the upper cover of the housing
Name
DC 24 V
Lit green
PRE
Lit green
Rx
ERROR
Display of the basic states of the module by the "DIAG" LED
DIAG Meaning
Power OFF
Off
Module configured
• Startup
• Module not configured
• Firmware update
• Defect
• Error
• Alarm message
Module defective
Lit red
Meaning
Indicates that voltage is being applied via the external 24 V
power supply.
Indicates the presence of a transponder.
Indicates live communication with the reader.
A flashing pattern indicates the last error to occur. The mean-
ing of the flashing patterns is explained in the section "Error
messages (Page 31)".
Comment
-
Configuration was completed successfully and
no error occurred.
-
Check the ERROR LED and the 24 VDC LED for
more detailed error diagnostics.
Replace the module.
Operating Instructions, 02/2021, C79000-G8976-C328-03
SIMATIC RF120C