Status And Error Displays Of Cpu 31X; Table 2-7 General Status And Error Displays Of The Cpu 31X; Table 2-8 Bus Error Displays Of Cpu 31X - Siemens CPU 31 Series Technical Data Manual

2.2.5

Status and error displays of CPU 31x

General status and error displays
Table 2-7
LED designation
SF
DC5 V
FRCE
RUN
STOP
Status displays for the interfaces X1, X2 and X3
Table 2-8
CPU
315-2 DP
317-2 DP
31x-2 PN/DP
319-3 PN/DP
In the case of the CPU 319-3 PN/DP are located directly at the RJ45 socket (LEDs are not
1
labeled!)
CPU 31xC and CPU 31x, Technical Data
Manual, 01/2006 Edition, A5E00105475-06
General status and error displays of the CPU 31x
Color Meaning
red Hardware or software error.
green 5-V power for the CPU and the S7-300 bus
yellow LED is lit: Active force job
LED flashes at 2 Hz: Node flash test function (only CPUs with
firmware V2.2.0 or higher)
green CPU in RUN
The LED flashes during STARTUP at a rate of 2 Hz, and in HOLD
state at 0.5 Hz.
yellow CPU in STOP, or HOLD, or STARTUP
The LED flashes at 0.5 Hz when the CPU requests a memory reset,
and during the reset at 2 Hz.
Bus error displays of CPU 31x
LED designation
BF
BF1:
BF2:
BF1:
BF2:
LINK
RX/TX
BF1:
BF2:
BF3:
LINK
1
RX/TX
1
2.2 Operating and display elements: CPU 31x
Color Meaning
red Bus error at DP interface (X2)
red Bus error at interface 1 (X1)
red Bus error at interface 2 (X2)
red Bus error at interface 1 (X1)
red Bus error at interface 2 (X2)
green Connection at interface 2 (X2) is active
yellow Receive / Transmit data at interface 2 (X2)
red Bus error at interface 1 (X1)
red Bus error at interface 2 (X2)
red Bus error at interface 3 (X3)
green Connection at interface 3 (X3) is active
yellow Receive / transmit data at interface 3 (X3)
Operating and display elements
2-13