Mitsubishi MELSEC-Q Series User Manual page 110

5 DATA LINK PROCESSING TIME
5 - 3
(2) For remote I/O net mode
LS = BT {27 + (NI
BT: Constant (transmission rate)
Transmission rate 156 kbps 625 kbps 2.5 Mbps 5 Mbps
BT
NI: Final station number (must be a multiple of 8)
Final station number 1 to 8
NI
N: Number of connected modules
ni: Total number of occupied stations
ST: Constant
250 + (ni
F: Return processing time {only when there is a faulty station (including
error invalid and temporary error invalid stations)}
Number of faulty stations
(Example) Using the following system configuration when the transmission rate is
10 Mbps (assuming that there is no faulty station)
Station
number 1
Master
Remote
station
I/O station
1: (occupies 1 station)
BT = 0.8
NI = 3 8
N = 3
ni = 3
LS = 0.8 {27 + (8
= 430.84 [µ s]
= 0.43 [ms]
4.8) + (N 30) + (ni
51.2 12.8 3.2
9 to 16 17 to 24 25 to 32 33 to 40 41 to 48 49 to 56 57 to 64
8 16 24
15)
118
Station Station
1 number 2 1 number 3
Remote Remote
I/O station I/O station
ST = 250 + (ni
= 250 + (3
= 295
4.8) + (3 30) + (3
4.8)} + ST + F [µ s]
10 Mbps
1.6 0.8
32 40 48
BT (1 + number of retries)
1
15)
15)
4.8)} + 295
MELSEC-Q
56 64
5 - 3