Udp Sample Programming - Omron sysmac NX102-9 Series Owner's Manual

9-6-4

UDP Sample Programming

In this sample, the UDP socket service is used for data communications between the NJ/NX-series
Controller and a remote node.
IP address: 192.168.250.1
UDP port number: 6000
Built-in EtherNet/IP Port
The processing procedure is as follows:
1
The SktUDPCreate instruction is executed to request creation of a UDP socket.
2
Execute the SktUDPSend instruction to request sending. The data in SendSocketDat[] is sent.
3
The SktUDPRcv instruction is executed to request reception. The receive data is stored in
RcvSocketDat[].
4
The SktClose instruction is executed to close the socket.
ST
Internal
Variables
External
Variables
*1 For an NX701 CPU Unit or an NX102 CPU Unit, replace the variable with _EIP1_EtnOnlineSta (Port1 Online)
or _EIP2_EtnOnlineSta (Port2 Online), depending on the built-in EtherNet/IP port which is used.
For an NX1P2 CPU Unit, replace the variable with _EIP1_EtnOnlineSta (Port1 Online).
NJ/NX-series CPU Unit Built-in EtherNet/IP Port User's Manual (W506)
IP address: 192.168.250.2
UDP port number: 6001
Data sent.
Data received.
Ethernet line
Variable
Trigger BOOL
DoSendAndRcv BOOL
Stage INT
RcvSocketDat ARRAY[0..1999] OF
BYTE
WkSocket _sSOCKET
SendSocketDat ARRAY[0..1999] OF
BYTE
SktUDPCreate_instance SktUDPCreate
SktUDPSend_instance SktUDPSend
SktUDPRcv_instance SktUDPRcv
SktClose_instance SktClose
Variable
BOOL
*1
_EIP_EtnOnlineSta
Remote node
Data type Initial value
False
False
0
[2000(16#0)]
(Handle:=0,
SrcAdr:=(PortNo:=0, IpAdr:=''),
DstAdr:=(PortNo:=0, IpAdr:=''))
[2000(16#0)]
Data type Constant
9 Socket Service
Comment
Execution condi-
tion
Processing
Status change
Receive data
Socket
Send data
Comment
Online
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