Logicmaster only keeps track of the highest used address for each memory type. The same technique works for any memory type (%I,%M,%Q, etc). Your download will begin in a moment Not downloading? Download Series 90-30 Programming with VersaPro Part 1 manually.Series. Logicmaster will select the next available%R address. If you want to use the next available register when making changes to an existing program, simply type in%R without any numeric characters. The current offering is called Proficy Machine Edition. If any body knows the price please pass the information. Then i want to purchase it for single user. Can any one suggest me where from i download the trial version to check and test the software with cpu 350. Some body told me that versa pro have the capability to show the next free register while you programmed. In LM 90-30 the%R creates very ambiguity. Now i want to use windows based software which can be program GE fanuc series 90-30.