Using Rsnetworx And Rslogix 5000; Enabling Hsc Module Operation In A Remote Chassis - Rockwell Automation Allen-Bradley ControlLogix 1756-HSC User Manual

2-2 High Speed Counter Operation Within the ControlLogix System
Using RSNetWorx and
RSLogix 5000
Publication 1756-UM 007A-EN-P - October 2000
When an HSC module is created, the I/O configuration portion of
RSLogix5000 generates configuration data structures and tags for that
HSC module, whether the module is located in a local or remote
chassis. A remote chassis, also known as networked, contains the HSC
module but not the module's owner-controller.
After creating the HSC module, you can write specific configuration in
the module's data structures; you must access the module tags to
change information in the data structures. This process is explained in
detail in Chapter 5.
Application-specific configuration data is transferred
I M PORTAN T
to the controller during the program download and
sent to the HSC module during the initial power-up.
After HSC module operation has begun, you must
use ladder logic and message instructions to make
configuration changes.
Enabling HSC M odule Operation in a Remote Chassis
HSC modules in the same chassis as the controller are ready to run as
soon as the program download is complete. But you must run
RSNetWorx to enable HSC modules in the networked chassis.
Running RSNetWorx transfers configuration data to networked
modules and establishes a Network Update Time (NUT) for
ControlNet that is compliant with the desired communications options
specified for each module during configuration.
If you are not using HSC modules in a networked chassis, running
RSNetWorx is not necessary. However, anytime a controller references
an HSC module in a networked chassis, RSNetWorx must be run to
configure ControlNet.
Follow these general guidelines when configuring HSC modules:
1. Configure all HSC modules for a given controller using RSLogix
5000 and download that information to the controller.
2. If the HSC configuration data references a module in a remote
chassis, run RSNetWorx.
RSNetWorx must be run whenever a new module is
I M PORTAN T
added to a networked chassis. When a module is
permanently removed from a remote chassis, we
recommend that RSNetWorx be run to optimize the
allocation of network bandwidth.