Network technology

CC-Link Safety Specification

Specifications
	Ver. 1.12 (CC-Link Safety)	Ver. 1.00 (Reference)
Communication speed	10M/5M/2.5M/625K/156Kbps
Communication method	Broadcast polling
Synchronization method	Frame synchronization method
Encoding method	NRZI Encoding
Transmission path format	Bus format (EIA RS485 compliant)
Transmission format	HDLC compliant
Error control system	CRC16 (X¹⁶+X¹²+X⁵+1)
Error control system	CRC32^*1	–
Maximum number of link points	S-RY: 2,048bits S-RX: 2,048bits S-RWw: 128words S-RWr: 128words Note: When the system configuration includes standard stations, the maximum number of safety station link points decreases. (Refer to the next page.)	RY: 2,048bits RX: 2,048bits RWw: 256words RWr: 256words
Number of link points per module	Refer to Table 5.7.	Refer to Table 5.8.
Maximum number of occupied stations	2 stations	4 stations
Transient transmission (per Link Station)	Not applicable	960 bytes, maximum [150 byte M^2 ID/L^3], 34 bytes (ID/L M)]
Number. of connected modules	(1×a)+(2×b)+(3×c)+(4×d)≤ 64 stations a: No. of modules with 1 occupied station b: No. of modules with 2 occupied stations c: No. of modules with 3 occupied stations d: No. of modules with 4 occupied stations
Number. of connected modules	(16×A)+[54×(B+D+E)]≤ 2,304 A:No. of standard remote I/O stations B:No. of standard remote device stations D:No. of safety remote I/O stations E:No. of safety remote device stations Note: With a configuration of safety stations only, the maximum number of connected stations is 42.	(16×A)+(54×B)+(88×C)≤ 2,304 A:No. of standard remote I/O stations B:No. of standard remote device stations C:No. of standard local stations and standard intelligent device stations
device station numbers	1 to 64
Cable	CC-Link dedicated cable (shielded 3-wire twisted pair cable)

*1:CRC32 generating polynomial: X³²+X²⁶+X²³+X²²+X¹⁶+X¹²+X¹¹+X¹⁰+X⁸+X⁷+X⁵+X⁴+X²+X+1(identical to IEEE802.3)
*2:Standard master station
*3:Standard intelligent device station / Standard local station
Of the above-described specifications, the communication speed and number of connected modules do not necessarily require all the specification elements stated.

Table 5.6 Station Configuration and No. of Link Points (Example)

Station Configuration	No. of Link Points
Link points with only safety stations connected (Case 1) →32 safety stations (with 2 stations occupied for each) are connected	Link points of S-RY/S-RX: 64 bits x 32 modules = 2,048 bits Link points of S-RWw/S-RWr: 4 words x 32 modules = 128 words
Link points with only safety stations connected (Case 2) →42 safety stations (with 1 station occupied for each) are connected	Link points of S-RY/S-RX: 32 bits x 42 modules = 1,344 bits Link points of S-RWw/S-RWr: 0 word x 42 modules = 0 word
Link points with safety stations and standard stations →1 standard station and 30 stations (both with 2 stations occupied) are connected	Link points of S-RY/S-RX: 64 bits x 30 modules = 1,920 bits Link points of RY/RX: 64 bits x 1 module = 64 bits Link points of S-RWw/S-RWr: 4 words x 30 modules = 120 words Link points of RWw/RWr: 8 words x 1 module = 8 words

Table 5.7 No. of Link Points per Safety Device Station in CC-Link Safety (Ver.1.12, Ver.1.13)

Device	1 Occupied Station	2 Occupied Stations
S-RX/S-RY	32 bits each	64 bits each
S-RX/S-RY		4 words each

Table 5.8 No. of Link Points per Device Station in CC-Link (Ver.1.10)

Device	1 Occupied Station	2 Occupied Stations	3 Occupied Stations	4 Occupied Stations
RX/RY	32 bits each	64 bits each	96 bits each	128 bits each
RWw/RWr	4 words each	8 words each	12 words each	16 words each