How port number should be designated in "opcda" function when communication with OPC DA server?

When accessing an OPC DA server using the Industrial Communication Toolbox, I understand that the IP address of the external PC should be set in the HostID parameter of the opcda command when creating the DA object. However, how should I specify the port number in this case?

DAobj = opcda(HostID,ServerID)

Answer 1

[MathWorks Support Team]

OPC(DA) communicates using the port 135 as default, and a random port ranging 1024 – 65535 will automatically be chosen for the return communication, so it isn't necessary to be care about the port number in the "opcda" function.