Siemens SIMATIC S7-300 Module data Technical Data

Operating and display elements
2.1 Operating and display elements: CPU 31xC
CPU 31xC and CPU 31x, Technical data
2-4 Manual, Edition 08/2004, A5E00105475-05
2.1.1 Status and Error Indicators: CPU 31xC
LED designation Color Meaning
SF red Hardware or software error
BF (for CPUs with DP
interface only)
red Bus error
DC5V green 5-V power for CPU and S7-300 bus is OK
FRCE yellow Force job is active
RUN green CPU in RUN
The LED flashes during STARTUP at a rate of 2 Hz, and in HOLD
state at 0.5 Hz.
STOP yellow CPU in STOP and HOLD or STARTUP
The LED flashes at 0.5 Hz when the CPU requests a memory reset,
and during the reset at 2 Hz.
Reference
• CPU operating modes: STEP 7 Online Help .
• Information on CPU memory reset:
Operating instructions CPU 31xC and CPU31x,
Commissioning, Commissioning Modules, CPU Memory Reset by means of Mode
Selector Switch
Evaluation of the LEDs upon error or diagnostic event: Operating
Instructions CPU 31xC and CPU 31x, Test Functions, Diagnostics and Troubleshooting,
Diagnostics with the help of Status and Error LEDs

Siemens SIMATIC S7-300 Module data Specifications

General

Series	S7-300
Manufacturer	Siemens
Protection Class	IP20
System	SIMATIC S7-300
Digital Inputs	Varies by module
Digital Outputs	Varies by module
Analog Inputs	Varies by module
Analog Outputs	Varies by module
Central Processing Unit	Varies by CPU model
Supply Voltage	24V DC or 120/230V AC
CPU Type	Varies (e.g., CPU 312, CPU 315, etc.)
Memory	Varies by CPU model
Communication Interfaces	MPI, PROFIBUS
Programming Languages	LAD, FBD, STL, SCL, GRAPH
Operating Temperature	0°C to 60°C
Storage Temperature	-40°C to 70°C
Relative Humidity	10% to 95% (non-condensing)