Mitsubishi Electric MELSEC Q Series User Manual page 250

(5) Transmission delay time calculation example
The following shows a calculation example for cyclic transmission delay time in a single network system.
The following indicates the system configuration and conditions.
CPU on sending and receiving station
Total number of stations per network
Total link device points
CC-Link IE controller network module
(a) Link refresh time (
The formula is indicated below.

T
Variable values are as follows:
KM1: Constants = 1.0
KM2: Constants = 0.36  10
LB, LW: Total number of points of link devices (LB and LW) = 1024
LX, LY: Total number of points of link devices (LX and LY) = 0
Assignment of variables in formulas are as follows:
 
= 1.0 + 0.36  10
,
T R
1.39(ms)
(b) Transmission delay time
Formulas in case LT is larger than LS with Block Data Assurance per Station enabled are indicated below.
Calculated
value
Normal value
Max. value
Variable values are as follows:
P : Sending side processing time = R
T
P : Receiving side processing time = R
R
R R : Refresh cycle = 100(ms)
T, R
 
: Link refresh time
,
T R
LS: Link scan time
*1 : For link scan time, refer to the following.
MELSEC-Q CC-Link IE Controller Network Reference Manual
Assignment of variables in formulas are as follows:
Normal value
= {(100 + 1.39)  2} + 1.25 + (100 + 1.39) = 305.420(ms)
Max. value
248
Item
Refresh cycle
Transient transmission
Block data assurance per station
Faulty station

)
,
T R
Link refresh time
, 
= KM1 + KM2  {(LB + LX + LY) / 16 + LW}
R
-3
-3
 {(1024 + 0 + 0) / 16 + 1024}
Transmission delay time
P  1.5 + LS  0.5
T
P  2 + LS
T
T
1.39(ms)
*1
1.25(ms)
= {(100 + 1.39)  1.5} + (1.25  0.5) + {(100 + 1.39)  0.5} = 203.405(ms)
LB/LW
LX/LY
SB/SW
Enabled (Block data assurance per station)
+ P  0.5
R
+ P
R
+ 
T
+ 
R R
Description
C Controller module
2 (Control station: 1, Normal station: 1)
1024 points
0 points
0 points
100ms
None
Installed to Slot 0 of main base unit
None