Byte Parameter Data type Start value Description
62 ... 63 spare WORD 0000h irrelevant
*) The partner IP address is specified by calling the TUSEND/TURECV parameter via the ADDR parameter.
8.1.6.2 Data structure for communications access point
A communications access point provides the link between application of the communica-
tion layer of the operating system. Defined for communication over UDP, each communi-
cation partner a communication access point using a DB. Facility whereby the DB's data
structure from the UDT 65 "TCON_PAR".
Data structure
Byte Parameter Data type Start value Description
0 ... 1 block_length WORD 40h Length of UDT 65: 64 Bytes (fixed)
2 ... 3 id WORD 0000h
n Reference to this connection between the
user program and the communications level
of the operating system (range of values:
0001h ... 0FFFh)
n You must specify the value of the parameter
in the respective block with the ID.
4 connection_type BYTE 01h Connection type:
n 13h: UDP
5 active_est BOOL FALSE ID for the way the connection is established:
You must assign FALSE to this parameter since
the communications access point can be used
to both send and receive data.
6 local_device_id BYTE 02h Communication device
n 00h: Ethernet PG/OP channel of the CPU
n 02h: Ethernet CP of the CPU
7 local_tsap_id_len BYTE 02h Length of parameter local_tsap_id used; pos-
sible value: 2
8 rem_subnet_id_len BYTE 00h This parameter is currently not used. Value 00h
(fix).
9 rem_staddr_len BYTE 00h This parameter is currently not used. Value 00h
(fix).
10 rem_tsap_id_len BYTE 00h This parameter is currently not used. Value 00h
(fix).
11 next_staddr_len BYTE 00h This parameter is currently not used. Value 00h
(fix).
VIPA SPEED7
Network Communication
Open Communication > UDT 65 - TCON_PAR Data structure for FB 65
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