Mitsubishi Electric MELSEC iQ-R Series User Manual page 173

In the remote I/O net mode
LS = BT {27 + (NI  4.8) + (N  30) + (ni  4.8)} + ST + RT + F [s]
BT: Constant (transmission speed)
Transmission speed 156kbps
BT 51.2
NI: Last station number (The value should be multiples of 8.)
Last station No. 1 to 8
NI 8
N: Number of connected modules (A reserved station is excluded.)
ni: Total number of occupied stations (A reserved station is excluded.)
ST: Constant
• 250 + (ni  10)
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}
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 + ST
625kbps
12.8
9 to 16 17 to 24 25 to 32
16 24 32
2.5Mbps 5Mbps
3.2 1.6
33 to 40 41 to 48
40 48
Appendix 7 Processing Time
10Mbps
0.8
49 to 56 57 to 64
56 64
APPX
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