Mitsubishi Electric MELSEC iQ-R Series User Manual page 172

RT: Retry processing time (Only the link scan with a faulty slave station where data link is being performed is added.)
 + β  (number of detected faulty stations - 1)
• : Retry processing time of the first station
BT  {(200 + R)  retry count setting value + 178.5}
When a transient request is issued: R: 13.2 + (NI  4.8) + (NW  9.6) + 180
When a transient request is not issued: R: 13.2 + (NI  4.8) + (NW  9.6)
• β: Retry processing time of the second and subsequent stations
BT  {(200 + P)  retry count setting value + 178.5}
P: 10.8
F: Return processing time (added only when there is a faulty station)
• BT  {243.1 + 210.8  (number of automatic return stations - 1)} + ST
In the remote device net mode
LS = BT  (27 + (NI  4.8) + (NW  9.6) + (N  30) + (ni  4.8) + (nw  9.6)) + ST + EX + (RT + F) [s]
BT: Constant (transmission speed)
Transmission speed
BT
NI: Last station number in A and B (The number of occupied stations included, but a reserved station excluded. The value
should be multiples of 8.)
• A: Last station number in a remote I/O station
• B: Last station number in a remote device station (The number of occupied stations is included.)
NW: Last station number in B (The number of occupied stations included, but a reserved station excluded. The value should
be multiples of 8.)
Last station No. 1 to 8
NI, NW 8
N: Number of connected modules (A reserved station is excluded.)
ni: a + b + c (A reserved station is excluded.)
• a: Total number of stations occupied by a remote I/O station
• b: Total number of stations occupied by a remote device station
nw: b (A reserved station is excluded.)
ST: Constant (The largest value in the results of  and . When B is 0, the result of  is ignored.)
 800 + (A  15)
 900 + (B  50)
EX: Constant (Add 50 to the sum in the table below when the remote net Ver.2 mode is used.)
Extended cyclic setting
Single
Double
Quadruple
Octuple
RT: Retry processing time (Only the link scan with a faulty slave station where data link is being performed is added.)
F: Return processing time (added only when there is a faulty station)
• BT  {243.1 + 210.8  (number of automatic return stations - 1)} + ST
APPX
170
Appendix 7 Processing Time
156kbps 625kbps
51.2 12.8
9 to 16 17 to 24
16 24
Number of occupied stations
1 station occupied
0
70  number of stations
90  number of stations
110  number of stations
2.5Mbps
3.2
25 to 32 33 to 40
32 40
2 stations occupied 3 stations occupied
0 0
80  number of stations 90  number of stations
110  number of stations 130  number of stations
160  number of stations 210  number of stations
5Mbps 10Mbps
1.6 0.8
41 to 48 49 to 56
48 56
4 stations occupied
0
100  number of stations
150  number of stations
260  number of stations
57 to 64
64