What is CC-Link Bus?

CC-Link (Control & Communication Link) is an open fieldbus. It features large data capacity and multi-level selectable communication speeds, and serves as a composite, open, and highly adaptable network system that can accommodate different ranges—from higher-level management layer networks down to lower-level sensor layer networks.

A CC-Link system refers to the system required for connecting distributed input/output units, intelligent function units, special function units, and other devices via dedicated cables, and controlling these units through a programmable logic controller (PLC).

Features of CC-Link

The network control system developed based on CC-Link offers advantages such as real-time performance, openness, comprehensive protection functions, fast communication rate, advanced network architecture, and convenient wiring.

CC-Link supports high-speed data transmission, with a maximum speed of up to 10 Mbit/s. The characteristic impedance of the cable is 100 Ω.

Applications of CC-Link

CC-Link follows the RS-485 standard for its lower-layer communication protocol. Generally, CC-Link mainly adopts a broadcast-polling method for communication; it also supports instant communication between the master station and local stations, as well as between the master station and intelligent device stations.

An entire single-layer CC-Link network can consist of 1 master station and 64 slave stations. In the network, the master station is served by a PLC, while slave stations can include remote I/O modules, special function modules, local stations with CPU and PLC, human-machine interfaces (HMIs), frequency converters, and various field instrumentation equipment such as measuring instruments and valves.

Supplementary Notes

1. Core Term Interpretation (Aligned with Industrial Fieldbus Norms)

• CC-Link: The full name is "Control & Communication Link," an international open industrial fieldbus standard. The abbreviation is retained in the translation (industry-wide practice), and its core feature of "connecting control and communication" is implied in the functional description to avoid redundant literal translation.

• Broadcast-polling: A dedicated communication mechanism in CC-Link, combining "broadcast" (master station sends signals to all slave stations) and "polling" (master station queries slave stations one by one for data). The term is translated as a hyphenated compound word to reflect its integrated mechanism, which is consistent with technical documentation conventions.

• Master station/Slave station: Standard node definitions in CC-Link. "Master station" (controlled by PLC) is the network controller, and "Slave station" (including remote I/O, HMIs, etc.) is the controlled device. The translation strictly follows industrial bus terminology to avoid ambiguity (e.g., "slave station" is not mistakenly translated as "subordinate station").

2. Unit and Detail Standardization

• 10 M b/ s: Corrected to the international standard unit "10 Mbit/s" (megabits per second) in the translation. The original "M b/ s" is a typo; "Mbit/s" is the standard unit for data transmission rate in technical documents, distinguishing it from "MB/s" (megabytes per second) used in storage.

• 100 Ω: Written as "100 Ω" (with a space between the number and the unit), complying with the format requirements of electrical engineering parameters (e.g., impedance, resistance).

3. Sentence Structure for Technical ScenariosThe translation adopts a concise and logical structure (e.g., "It features... and serves as..." "A CC-Link system refers to...") to fit the style of product manuals, industrial network design documents, or equipment selection guides. For example, when describing application scope, it can be extended to: CC-Link is widely used in manufacturing industries such as automotive assembly and electronic component production, as its broadcast-polling mechanism ensures stable communication between PLCs and field devices.