Siemens SIMATIC NET S7-300 User Manual

6 Programmed Communication Connections
A-179
S7-CPs for Industrial Ethernet Configuring and Commissioning
Release 01/2007
C79000-G8976-C182-07
Table 6-10 , continued
Subfield
ID
1)
Meaning of the ParameterSubfield length
(in bytes)
Subfield type
23 SUB_ADDR_IN_DATABLOCK 1 + 4 Select free UDP connection.
The remote node is entered in the job
header of the job buffer by the user
program when it calls AG_SEND. This
allows any node on Ethernet/LAN/WAN
to be reached.
 Possible values:
1 = free UDP connection.
0 = otherwise
The parameter is practical only for a
UDP connection.
See also Section 5.7.5
24 SUB_NTP_SERVER 4 + 4 The sub-block defines an NTP server
from which the CP can obtain its time
via the NTP protocol.
For the situation when one or more
NTP servers are not obtainable, up to 4
sub-blocks of ID 24 can be defined.
The sub-blocks of ID 24 may only be
installed in the system parameter block
type 0 / ID 0 (see Section 6.4).
1)
Note: ID numbers not listed are not currently used.

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)