Siemens SIMATIC NET S7-300 User Manual

5 Configuring Communication Connections
A-157
S7-CPs for Industrial Ethernet Configuring and Commissioning
Release 01/2007
C79000-G8976-C182-07
Messages in the Diagnostic Buffer
As a result of FETCH/WRITE access, negative acknowledgments from the S7
CPU are possible. This then leads to corresponding connection-oriented entries in
the diagnostic buffer that you can read out with NCM Diagnostics (see Section
8.5).
Table 5-8 Message Coding in the Diagnostic Buffer with FETCH/WRITE
Coding
Meaning
01
H
Hardware fault
03
H
Object access is not permitted.
05
H
Invalid address (syntax ID, area, type, bit number)
06
H
Data type not currently supported
07
H
Data type is not consistent.
0A
H
The object does not exist or the end of the area has been excee-
ded.
FF
H
Internal protocol error

Siemens SIMATIC NET S7-300 Specifications

General

Product Type Designation	SIMATIC NET S7-300
Mounting	DIN rail mounting
Protection Class	IP20
CPU Models	Various models available (e.g., CPU 312, CPU 314)
Communication Interfaces	MPI, PROFIBUS DP
Power Supply	24 V DC power supply required. Different power supply modules available.
I/O Modules	Digital input modules, digital output modules, analog input modules, analog output modules
Programming	STEP 7 software
Supply Voltage	24V DC or 120/230V AC (depending on model)
Digital Inputs	Available via digital input modules
Digital Outputs	Available via digital output modules
Analog Inputs	Available via analog input modules
Analog Outputs	Available via analog output modules
Communication Functions	MPI, PROFIBUS DP, Ethernet (depending on model)
Protocols	MPI, PROFIBUS DP, TCP/IP (depending on model)
Operating Temperature	0°C to 60°C
Storage Temperature	70 °C
Memory	Depends on CPU model (e.g., 32 KB to 1.5 MB)