Siemens SIMATIC S7-300 Module data Reference Manual

Analog Modules
4-72
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
Reading out diagnostic messages
You can read out detailed diagnostic messages by means of SFCs in the user
program (refer to the Appendix “Diagnostic Data of Signal Modules”).
You can view the cause of the error in STEP 7, in the module diagnosis (refer to
online Help for STEP 7).
Diagnostic message in the measured value of analog input modules
Every analog input module supplies the measured value 7FFF
H
irrespective of the
parameter assignment when an error is detected. This measured value means
either Overflow, Malfunction or a channel is disabled.
Diagnostic message by means of SF LED
Every analog module indicates errors for you by means of your SF LED (group
error LED). The SF LED lights as soon as a diagnostic message is triggered by the
analog module. It goes out when all errors have been rectified.
Diagnostic messages of the analog input modules
The table below gives an overview of the diagnostic messages for the analog input
modules.
Table 4-46 Diagnostic Messages of the Analog Input Modules
Diagnostics Message
LED Diagnostics
Effective for
Parameters can
be assigned
External auxiliary supply missing SF Module No
Configuring/parameter assignment
error
SF
Channel Yes
Common-mode error SF Channel Yes
Wire-break SF Channel Yes
Underflow SF Channel Yes
Overflow SF Channel Yes

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)