Rockwell Automation 1756-LSC8XIB8I ControlLogix Low-speed Counter Module - Manual (Page 48)

48 Rockwell Automation Publication 1756-UM536A-EN-P - April 2012
Chapter 4 Configure the Module
Connection Formats
The initial configuration of a module requires you to choose a connection
format. If needed, you can change the connection format when offline after the
configuration is downloaded to the controller.
Multiple controllers can receive data being produced by a module. The
connection format determines the following:
• Whether a controller configures or just listens to data
• The type of configuration options that are available
• The tags that are generated during the initial configuration
Table 4 describes the connection formats available for the counter module.
Configure
Connection Properties Connection properties define controller-to-module behavior. When defining
connection properties, you can do the following:
• Select an RPI. The RPI guarantees the slowest rate at which input tag data,
including pulse count, pulse width, and pulse frequency values, are
produced to the system. The module’s actual data transfer rate may be
faster than the RPI setting, but the RPI provides a defined, maximum
period of time at which data is produced.
• Inhibit the module.
• Configure the controller so that a loss of connection to this module causes
a major fault.
• View information about the condition of the connection between the
module and the controller.
Table 4 - Counter Module Connection Formats
Connection Format Description
Data Results in two types of input data:
• Count or frequency values from counters 0…7
• Counter control input data or general purpose input data from standard hardware
inputs 0…7
Results in two types of output data:
• Configuration data sent to the module from the owner-controller upon powerup
reconfiguration
• Output data for counter operation
Listen Only Allows a controller to establish a Listen-only connection with the counter module.
Results in two types of input data:
• Count or frequency values from counters 0…7
• Counter control input data or general purpose input data from standard hardware
inputs 0…7