I have a 502 processor 1747 -- L524 with four K. memory in a seven slot rack.. I'm trying to configure a 1746 HSCE high-speed counter module. This module is in slots six ,, the a. b input lights on the high-speed module flash as I rotate the counter. Now to ask the really stupid question. How to access this module" I can go into the data table and look at input I:6.0 thou I:6.7 and see the high-speed module input addresses. But do not see them alternate or change. I guess what I'm asking is where and how do I configure the program to see these inputs on this module or what command is used in the latter logic. I scavenged this PLC out of the derelict piece of equipment I would like to understand how the high-speed counter is accessed and the information processed in the latter logic.. I see a high-speed counter tab on the instruction palette. But they are grayed out .