CC-Link specifications
Specifications | ||||||||
|---|---|---|---|---|---|---|---|---|
Communication speed | 10M/5M/2.5M/625k/156 kbps | |||||||
Communication method | Broadcast query method | |||||||
Synchronization method | Frame synchronization | |||||||
Coding method | NRZI coding | |||||||
Format of the transmission link | Bus format (conforms to EIA RS485) | |||||||
Transmission format | HDLC-compliant | |||||||
Max. number of devices that can be connected | 64 | |||||||
Number of slave stations | 1 - 64 | |||||||
Features | Technical data | |||||||
Version 1.10 | Version 2.00 | |||||||
Maximum number of link addresses | decentralized I/O (RX, RY), bit | 2048 bits each mixed*1: 4096 bits | 8192 bits each, mixed*2: 16384 bits | |||||
Decentralized registers (RWr, RWw), Word | 256 words each mixed: 512 words | 2048 words each mixed*2: 4096 words | ||||||
Extended cyclic setting | - | Single | Double | Quadruple | Octuple | |||
Number of link addresses per device | 1 occupied station | RX, RY, (bit) | 32 (mixed: 64) | 32 (mixed: 64) | 64 (mixed: 128) | 128 (mixed: 256) | ||
RWr, RWw, (Word) | 4 (mixed: 8) | 8 (mixed: 16) | 16 (mixed: 32) | 32 (mixed: 64) | ||||
2 occupied stations | RX, RY, (bit) | 64 (mixed: 128) | 96 (mixed: 192) | 192 (mixed: 384) | 384 (mixed: 768) | |||
RWr, RWw, (Word) | 8 (mixed: 16) | 16 (mixed: 32) | 32 (mixed: 64) | 64 (mixed: 128) | ||||
3 occupied stations | RX, RY, (bit) | 96 (mixed: 192) | 160 (mixed: 320) | 320 (mixed: 640) | 640 (mixed: 1280) | |||
RWr, RWw, (Word) | 12 (mixed: 24) | 24 (mixed: 48) | 48 (mixed: 96) | 96 (mixed: 192) | ||||
4 occupied stations | RX, RY, (bit) | 128 (mixed: 256) | 224 (mixed: 448) | 448 (mixed: 896) | 896 (mixed: 1792) | |||
RWr, RWw, (Word) | 16 (mixed: 32) | 32 (mixed: 64) | 64 (mixed: 128) | 128 (mixed: 256) | ||||
Maximum number of occupied stations | 4 stations | |||||||
*1: "mixed" means "the same number of RX and RY are used or created".
Special feature of the decentralized I/Os (RX, RY), (BIT)
The I/O bits (RX, RY) of the decentralized device station (EL6711-0010) are divided into a user area and a system area. The size of the user area depends on the number of occupied stations and the extended cyclic setting. The system area always consists of the last 16 bits of the configured I/O bits (RX, RY). This must be taken into account during configuration!
Example 1:
For the extended cyclic setting "single" corresponds to the user area for:
- 1 occupied station: 16 I/O bits (RX,RY)
- 2 occupied stations: 48 I/O bits (RX,RY)
- 3 occupied stations: 80 I/O bits (RX,RY)
- 4 occupied stations: 112 I/O bits (RX,RY)
Example 2:
For the extended cyclic setting "quadruple" corresponds to the user area for:
- 1 occupied station: 48 I/O bits (RX,RY)
- 2 occupied stations: 176 I/O bits (RX,RY)
- 3 occupied stations: 304 I/O bits (RX,RY)
- 4 occupied stations: 432 I/O bits (RX,RY)
