Siemens SIMATIC S7-300 Module data Reference Manual

Digital Modules
3-78
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
Diagnostic Messages of the SM 322; DO 8 x 24 VDC/0.5 A
The following table provides an overview of the diagnostic messages of the
SM 322; DO 8 x 24 VDC/0.5 A.
Table 3-20 Diagnostic Messages of the SM 322; DO 8 x 24 VDC/0.5 A
Diagnostics Message
LED Scope of the
Diagnostics
Parameters can
be assigned
Wire-break SF Channel Yes
Load voltage missing SF Channel Yes
Short-circuit to M SF Channel Yes
Short-circuit to L+ SF Channel Yes
External auxiliary supply missing SF Module No
Internal auxiliary power missing SF Module No
Fuse blown SF Module No
Watchdog timeout SF Module No
EPROM error SF Module No
RAM error SF Module No
* Open-circuit detection is performed at a current < 1 mA.
When suitably parameterized, a wire-break results only in the
SF LED and the corresponding channel error LED lighting up.
Note
A prerequisite for detecting the errors indicated by programmable diagnostic
messages is that you have assigned parameters to the digital module accordingly
in STEP 7.

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)