Rockwell Automation 1756-HSC ControlLogix High Speed Counter Module - Manual (Page 63)

Rockwell Automation Publication 1756-UM007C-EN-P - November 2011
Configure the 1756-HSC Module 63
The table lists the mode number and assigned tags for the HSC Data and
HSC Data-extended Comm Formats. The HSC Data format does not create
the Totalizer tag, so directional frequency with the counters is not available.
See Appendix B for a complete list and description of configuration, input,
and output tags.
Communication Format Modes and Tags
Comm Format = HSC Data
(1756-HSC version 1.x or later)
Tags
Operational Mode Mode (Tag Value) Present Value Stored Value
Counter 0
Accumulated count Stored value Encoder X1 1
Encoder X4 2
Counter Not Used 3 N/A N/A
Frequency
(Rate Measurement)
(1)
4 No. of input pulses occurring in
sample period Frequency in Hz
Comm Format = HSC Data-extended
(1756-HSC module version 3.x or later)
Tags
Operational Mode Mode (Tag Value) Present Value Stored Value Totalizer
Counter 0
Accumulated count Stored value Directional frequency
(2) Encoder X1 1
Encoder X4 2
Counter Not Used 3 N/A N/A N/A
Frequency
(Rate Measurement)
(1)
4 No. of input pulses occurring in
sample period
Frequency in Hz
Accumulated count
(3)
Frequency
(Period Rate)
(1)
5
No. of 4 MHz pulses occurring in
sample period
Accumulated count
Frequency
(Continuous Rate)
(1)
6
(1) Modes where frequency controls the outputs.
(2) B-input state defines direction (Counter mode).
(3) Rollover/Preset settings apply.