PJLink is an overlay of the TCP protocol, used to communicate with video projectors. More info here.
The parameters for this module are almost the same as the TCP Client.
https://bkuperberg.gitbook.io/~gitbook/image?url=https%3A%2F%2F654853773-files.gitbook.io%2F~%2Ffiles%2Fv0%2Fb%2Fgitbook-legacy-files%2Fo%2Fassets%252F-M0J6klA7kDd2pwFQXYj%252F-M0J77Q7DvhqgPT4biK8%252F-M0J7FnS17wJiAXgY5eF%252Fpjlink.png%3Fgeneration%3D1581959444124664%26alt%3Dmedia&width=768&dpr=4&quality=100&sign=7413801c83ead2174fb28fa10ec7d33585616d41dd42da7002156e05377f38d5
Because it's a slightly modified TCP Client module, you can check the docs for the parameters on the TCP Client page.
The remote port is by default set up to the default PJLink port setting that is 4352. You can change that if that's not the port set up in the projector.
There are already precreated values who will be updated when the projector sends back informations about its status.