Mitsubishi Electric MELSEC-QS Series Safety Application Manual page 160

APPENDICES
Final station No.
APPX
- 4 Appendix 1 Calculating Safety Response Time of CC-Link Safety
(a) Link scan time of CC-Link Safety (LS)
The following is the formula to calculate link scan time (LS) [ s] of CC-Link Safety.
LS = BT (27 + (NI
+ TR) + ST + RT+ F [ s]
BT: Constant
Transmission speed
BT
NI : Final station No. in A and B (Higher value between A and B)
(including the station number of occupied station and excluding that of
reserved station, in multiples of 8.)
NW : Final station No. in B
(including the station number of occupied station and excluding that of
reserved station, in multiples of 8.)
A : Final station No. of standard remote I/O stations on CC-Link Safety
(including the station number of occupied station and excluding that of
reserved station)
(When not connecting standard remote station on CC-Link Safety, put 0 to
A.)
B : Final station No. of safety remote I/O stations on CC-Link Safety and
remote device stations (including the station number of occupied station
and excluding that of reserved station)
1 to 8
NI, NW 8
N : Number of connected modules (excluding reserved stations)
ni : a + b
a : Total number of occupied standard remote I/O stations on CC-Link Safety
(excluding the station number of reserved station)
b : Total number of occupied safety remote I/O stations on CC-Link Safety and
remote device stations (excluding the station number of reserved station)
nw : b
TR : Constant
Constant
TR
ST : Constant
(for asynchronous mode only. For synchronous mode, ST = 0.)
(1) or 2), whichever is greater. Ignore 2) when B = 0.)
1) 800 + (A
2) 900 + (B
4.8) + (NW 9.6) + (N
LS calculation formula
156kbps 625kbps
51.2
9 to 16 17 to 24 25 to 32
16 24 32
Numeric value
38.4
15)
50)
30) + (ni 4.8) + (nw
2.5Mbps
12.8 3.2
33 to 40 41 to 48
40 48
9.6)
5Mbps 10Mbps
1.6 0.8
49 to 56 57 to 64
56 64