Siemens SINAMICS S120 Commissioning Manual page 186

Diagnostics
3.1 Diagnostics via LEDs
Control Unit 320-2 DP while powering up
Table 3- 2
flashing
light 2 Hz
flashing
light 2 Hz
flashing
0.5 Hz
Table 3- 3
Orange
184
Load software
LED
RDY DP
Red Orange
Red Red
Red Red
Red Red
flashing light
2 Hz
Red Orange
flashing light
Red Off
Off Red
Red Red flashing
light 0.5 Hz
light
Firmware
LED
RDY DP
Off
Alternating
State
OPT
Orange Reset
Off BIOS loaded
Off BIOS error
Off File error
Off FW loading
Off FW loaded
Off FW checked
(no CRC error)
Off FW checked
(CRC error)
State
OPT
Off Initializing
Running
Commissioning Manual, (IH1), 01/2012, 6SL3097-4AF00-0BP2
Comment
Hardware reset
RDY LED lights up red, all other LEDs light
up orange
–
Error occurred while loading the BIOS

Memory card not inserted or faulty

Software on memory card not present

or corrupted
RDY LED lights up red, PN LED flashes
orange without fixed frequency
-
CRC invalid

Comment
–
See the table below
Commissioning Manual