Rockwell Automation 1756-HSC ControlLogix High Speed Counter Module - Manual (Page 62)

Rockwell Automation Publication 1756-UM007C-EN-P - November 2011
62 Configure the 1756-HSC Module
Communication Format Options
Multiple controllers can receive data being produced by a 1756-HSC module.
The communication format determines:
• whether a controller owns or just listens to the information.
• the type of configuration options that are available.
• the tags that are generated during the initial configuration.
The following table describes the four communication formats available for
the 1756-HSC/B module.
Communication Format Description
HSC Data Format used by an owner-controller to
invoke the original functionality for the
1756-HSC module. ‘Data’ format generates
tag structures identical to those used by
older revision 1.
x HSC modules. This format
is compatible with revision 3. x HSC
firmware but will limit the 1756-HSC
module to revision 1.
x functionality.
HSC Data-extended Format used by an owner-controller to
invoke the 1756-HSC module for data
enhancements in HSC revision 3.
x.
‘Data-extended’ format functionality
includes Period Rate and Continuous Rate
Frequency modes and dynamic control of
Preset, Rollover, and Output On/Off values.
Listen-only HSC Data Format used by a controller to listen-only to
a 1756-HSC module that is using the
HSC Data Comm Format that is configured
by another controller.
Listen-only Extended Format used by a controller to listen-only to
a 1756-HSC module that is using the
HSC Data-extended Comm Format that is
configured by another controller.
IMPORTANT
See page 63 for specific modes and tags for the HSC Data and
HSC Data-extended Comm Formats.