Processor Type(SLC 500)

[Tom749 0]

1. How can I know the Processor Type in my case? 2. In addition to those what is the meaning of the FRN? In my opinion that is the one of them, 1747-L553B/C 5/05 CPU - 64K Mem. OS501 Series C/1747-L553B/C 5/05 CPU - 32K Mem. OS501 Series C/1747-L553B/C 5/05 CPU - 16K Mem. OS501 Series C as high-lighted on the attached picture. Thaks for your help in advance. p.s. I attach some pictures for your reference. Edited 29 Oct 2010 by Tom749

[Ken Moore 23]

FRN: This is the firmware revision level, your photo shows this processor is at level 11. Your Photo shows a 553, what exactly is your question, not sure I understand correctly.

[Tom749 0]

Shortly when you see the attached picture, how can I know the Memory size among the 64K/32K/16K sizes in my CPU module?

[ScottC 8]

In the second picture, take a closer look at the processor types you have highlighted. All the SLC modular processor catalog numbers are formatted as 1747-L5xy. The x denotes the processor type, i.e. 1 = SLC5/01, 4 = SLC5/04, 5 = SLC5/05. The y denotes the memory size, i.e. 1 = 16K, 2 = 32K, 3 = 64K, for the 5/04s and 5/05s. So, since you have a 1747-L553, it has 64K of memory.