Technical data

Open Communication via Industrial Ethernet
System Software for S7-300/400 System and Standard Functions - Volume 2/2
23-10 A5E00739858-01
Byte Parameter Data
Type
Start Value Description
12 to
27
local_tsap_id ARRAY
[1..16] of
BYTE
B#16#00 ...
• Local port no. (possible values: 2000 to 5000),
local_tsap_id[1] = high byte of port no. in
hexadecimal representation,
local_tsap_id[2] = low byte of port no. in
hexadecimal representation,
local_tsap_id[3-16] = irrelevant
Note: Make sure that each value of local_tsap_id
that you use in your CPU is unique.
28 to
33
rem_subnet_id ARRAY
[1..6] of
BYTE
B#16#00 ... This parameter is currently not used. You must
assign 0 to it.
34 to
39
rem_staddr ARRAY
[1..6] of
BYTE
B#16#00 ... This parameter is currently not used. You must
assign 0 to it.
40 to
55
rem_tsap_id ARRAY
[1..16] of
BYTE
B#16#00 ... This parameter is currently not used. You must
assign 0 to it.
56 to
61
next_staddr ARRAY
[1..6] of
BYTE
B#16#00 ... This parameter is currently not used. You must
assign 0 to it.
62 to
63
spare WORD W#16#0000 irrelevant
CPU Dependencies for UDP Connection Types
The UDP connection type (connection_type=B#16#13) exists for CPUs 31x-2
PN/DP as of firmware version V2.4.
For information on the number of possible connections between the user program
and the communications level of the operating system, please refer to the technical
data for your CPU.
Configuring the local communications access point
Each communications partner must configure its local communications point
independently of the other partner. This pertains to establishing the connection
between the user program and communications level of the operating system.
See also:
Examples of Parameters for Communications Connections