C

channel

A channel defines a path for input and output signals for communication between hardware and software programs.

Channel 0

Refers to the DF1 serial port of an enhanced

PLC-5

, an

SLC

5/03+, or a

ControlLogix

controller.

chassis

A hardware assembly that houses devices such as I/O modules, adapter modules, processor modules, and power supplies.

Common Industrial Protocol (CIP)

The Common Industrial Protocol (CIP) is an industrial protocol for industrial automation applications supported by ODVA. Previously known as Control and Information Protocol, CIP defines messages and services for the collection of manufacturing automation applications – control, safety, synchronization, motion, configuration, and information. It is used in EtherNet/IP, DeviceNet, CompoNet, and ControlNet. Extensions to CIP are CIP Safety, CIP Motion, CIP Security, and CIP Sync.

CIP security

CIP security has multiple layers of security that enables a CIP-connected device to protect itself from malicious CIP communications. Then the device can reject data that has been altered, reject messages sent by untrusted people or untrusted devices, and reject messages that request actions that are not allowed. CIP security defines the notion of a security profile, which is a set of well-defined capabilities to facilitate device interoperability and end-user selection of devices with the appropriate security capability.

communications tree

A hierarchical representation of a network topology that is rooted at a specific server host device.

configuration

A file that contains information about the physical structure you defined for your system. This file includes all network paths, defined drivers and devices, Data Providers, and object protocols.

connection (I/O)

A connection links an address block to a data source, such as a device or memory.

connection (shortcut)

The association of a shortcut with a device, including the specification of a communication path through the topology. There may be a design connection, a runtime connection, a primary connection, or a secondary connection.

control system

A network topology with one or more controllers capable of executing a manufacturing process.

cyclic redundancy check (CRC)

A Cyclic Redundancy Check (CRC) is an error checking technique used by computers.