Siemens SIMATIC S7 System Manual page 424

103BCommunication
10.2 PROFINET
The configuration data of CONF_DB consists of a field that contains a header
(IF_CONF_Header) and several subfields. IF_CONF_Header provides the following
elements:
● field_type_id (data type UInt): Zero
● field_id (data type UInt): Zero
● subfield_cnt (data type UInt): Number of subfields
Each subfield consists of a header (subfield_type_id, subfield_length, subfield_mode) and
the subfield-specific parameters. Each subfield must consist of an even number of bytes.
The subfield_mode supports a value of 1 (permanent validity of the configuration data)
Note
Only one field (IF_CONF_Header) is currently allowed. Its parameters field_type_id and
field_id must have the value zero. Other fields with different values for field_type_id and
field_id are subject to future extensions.
In the IF_CONF_Header field, only two subfields, "addr" (IP address) and "nos" (Name of
station) are currently allowed.
Table 10- 24 Subfields supported
subfield_type_id
30
40
Table 10- 25 Elements of the IF_CONF_V4 data type
Name Data type
Id UInt
len UInt
mode UInt
InterfaceAddress IP_V4
ADDR Array [1..4] of Byte
ADDR[1] Byte
ADDR[2] Byte
ADDR[3] Byte
ADDR[4] Byte
SubnetMask IP_V4
ADDR Array [1..4] of Byte
ADDR[1] Byte
ADDR[2] Byte
ADDR[3] Byte
ADDR[4] Byte
424
Data type
IF_CONF_V4
IF_CONF_NOS
Explanation
IP parameters: IP address, subnet mask, router address
PROFINET IO device name (Name of station)
Start value Description
30 subfield_type_id
18 subfield_length
1 subfield_mode (1: permanent)
- Interface address
b#16#C8 IP address high byte: 200
b#16#0C IP address high byte: 12
b#16#01 IP address low byte: 1
b#16#90 IP address low byte: 144
- Subnet mask
b#16#FF Subnet mask high byte: 255
b#16#FF Subnet mask high byte: 255
b#16#FF Subnet mask low byte: 255
b#16#00 Subnet mask low byte: 0
S7-1200 Programmable controller
System Manual, 11/2011, A5E02486680-05