Allen-Bradley CompactLogix 5370 L1 User Manual

Rockwell Automation Publication 1769-UM021G-EN-P - October 2015 175
Use I/O Modules with CompactLogix 5370 L1 Controllers Chapter 7
Common Configuration Parameters
While the configuration options vary from module to module, there are some
common options you typically configure when using 1734 POINT I/O modules
in a CompactLogix 5370 L1 control system, as described in Table 8
.
I/O Connections
A CompactLogix 5370 L1 control system uses connections to transmit I/O data.
Tab le 9
describes the connection types.
Table 8 - Common Configuration Parameters
Configuration Option Description
Requested packet interval (RPI) The RPI specifies the interval at which data is transmitted or received over a connection. For POINTBus backplane local expansion
modules, data is transmitted to the controller at the RPI.
When scanned on the local bus or over an EtherNet/IP network, I/O modules are scanned at the RPI specified in the module
configuration. Typically, you configure an RPI in milliseconds (ms).
• For local expansion modules, the range is 1.0…750 ms and the RPI must be configured in 0.5 ms increments. That is, you cannot set
the RPI to a value of 2.3 ms. It must be 2.0 or 2.5.
• For remote I/O modules over an EtherNet/IP network, the range is 2.0…750 ms and the RPI must be configured in 1.0 ms
increments. That is, you cannot set the RPI to a value of 2.3 ms. It must be 2.0 or 3.0.
Module definition Set of configuration parameters that affect data transmission between the controller and the I/O module. The parameters include the
following:
• Series - Hardware series of the module.
• Revision - Major and minor firmware revision levels that are used on the module.
• Electronic Keying - See LOGIX-AT001
for Electronic Keying information.
• Connection - Type of connection between the controller that writes the configuration and the I/O module, such as Output.
• Data format - Type of data that is transferred between the controller and I/O module and what tags are generated when the
configuration is complete.
Major Fault on Controller If Connection
Fails While in Run Mode
This option determines how the controller is affected if the connection to an I/O module fails in Run mode or if the controller is unable to
establish a connection to the module. You can configure the project so that a connection failure causes a major fault on the controller or
not. The default setting is for the option to be disabled.
For example, if this option is enabled and an I/O module is removed while in Run mode, a major fault occurs on the controller. The default
setting for the embedded I/O module is that this option is enabled. The default setting for local expansion modules is that this option is
disabled.
IMPORTANT
You can only use direct connections with the local expansion modules in a
CompactLogix 5370 L1 control system.

Allen-Bradley CompactLogix 5370 L1 Specifications

General

Brand	Allen-Bradley
Model	CompactLogix 5370 L1
Category	Controller
Language	English