You can use the official pjlink test software for confirm that teh projector is answering correct to the comands. http://pjlink.jbmia.or.jp/english/data_cl2/PJLink_5-2.zip
workaround the information below, maybe help you.
for help: from panasonic PT-Z870 on page 168.
These week we finished an installation with 3 Panasonic Projectors 2 x WD6300 and 1 PT-Z870UK, all of them controled by pjlink working fine , we only need to set the network password as none,
so login: admin1 ( default to Panasonic ) and password: none ( blank )
Sorry by that.
Customer support service by UserEcho