Status And Error Displays Of The Cpu 31X - Siemens Simatic S7-300 Technical Data Manual

2.2.4

Status and error displays of the CPU 31x

General status and error displays
Table 2-6
LED designation
SF
DC5V
FRCE
RUN
STOP
Displays for the X1 and X2 interfaces
Table 2-7
CPU
315-2 DP
317-2 DP
31x-2 PN/DP
Reference
• CPU operating modes:
• Information on CPU memory reset:
• Evaluation of the LEDs upon error or diagnostic event:
CPU 31xC and CPU 31x, Technical data
Manual, Edition 08/2004, A5E00105475-05
General status and error displays of the CPU 31x
Color
red
green
yellow
green
yellow
Bus error displays of CPU 31x
LED designation
BF
BF1
BF2
BF1
BF2
LINK
RX/TX
Commissioning, Commissioning Modules, CP Memory Reset by means of Mode Selector
Switch
and CPU 31x, Test Functions, Diagnostics and Troubleshooting, Diagnostics with the
help of Status and Error LEDs
2.2 Operating and display elements: CPU 31x
Meaning
Hardware or software error.
5-V power for the CPU and the S7-300 bus
LED is lit: Active force job
LED flashes at 2 Hz: Node flash test function (only CPUs with
firmware V2.2.0 or higher)
CPU in RUN
The LED flashes during STARTUP at a rate of 2 Hz, and in HOLD
state at 0.5 Hz.
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.
Color Meaning
red Bus error at DP interface (X2)
red Bus error at interface 1 (X1)
red Bus error at interface 2 (X1)
red Bus error at interface 1 (X1)
red Bus error at interface 2 (X1)
green Active communication at interface 2 (X2).
yellow Receive / Transmit data at interface 2 (X2)
STEP 7 Online Help
.
Operating instructions CPU 31xC and CPU31x,
Operating and display elements
Operating Instructions CPU 31xC
2-11