Rockwell Automation 1746-HSCE2 Multi-Channel High Speed Counter Module - Manual (Page 18)

Publication 1746-UM002B-EN-P - August 2004
1-4 Module Overview
Operating Class Module operation differs slightly based on the operating class. The
operating class is selected via the module ID code.
Class 1
Class 1 operation is compatible with all SLC 500 processors. In Class 1
operation, the module uses 8 input and 8 output words and has an
associated ID code of 3511. A maximum of four 16-bit counters are
available in this operating class.
Class 4
Class 4 operation is compatible with SLC 5/03 and above systems. In
Class 4 operation, the module uses 23 input and 8 output words and
has an associated ID code of 15912. A maximum of four 24-bit
counters are available in this class.
Class 1 vs. Class 4 Comparison
Class Class 1 Class 4
Counters 16-bit (±32,767) 24-bit (±8,388,607)
Input Words 8 with limited information. 23 with all information.
Backplane Interrupts Not permitted. Permitted.
Use in RIO Chassis Permitted. Not permitted.
Use in ControlNet Chassis Not permitted. Permitted.
Module ID Code 3511 15912