Delay Time In Cyclic Transmission - Mitsubishi Electric MELSEC Q Series User Manual

13.5.2

Delay time in cyclic transmission

(1) CC-Link IE Controller Network
The following shows the formulas to obtain cyclic transmission delay time in the CC-Link IE Controller Network.
Block data assurance
Mode
Normal
mode
Extended
mode
P : Sending side processing time = R
T
P : Receiving side processing time = R
R
R R : Sending/receiving side refresh cycle (Page 175, Section 11.7.3)
T, R
 
: Sending/receiving side link refresh time
,
T R
LS: Link scan time
*1 : Total time for the number of mounted network modules.
*2 : For link scan time, refer to the following.
 MELSEC-Q CC-Link IE Controller Network Reference Manual
Remark
For multiple network system, transfer of link device(s) to another network by the relay station's CPU module by using the
inter-link transfer function affects the transfer processing time of the relay station's CPU module. For details, refer to the
following.
MELSEC-Q CC-Link IE Controller Network Reference Manual
If the sending module is a Q series programmable controller CPU, apply the following processing time of the
sending programmable controller CPU to the transmission delay time formulas instead of the stated sending side
processing time (P
P : Sending side processing time = Q
T
S : Sequence scan time of the programmable controller CPU (sending side) (link refresh time not included)
T

: Link refresh time of the programmable controller CPU (sending side)
T
*1 : For details, refer to the following.
MELSEC-Q CC-Link IE Controller Network Reference Manual
*2 : Total time for the number of mounted network modules.
R
T
per station
None (None)
When R
Valid
When R
When R
None
When R
When R
Valid
When R

+
T T

+
R
*2
).
T
: Programmable controller CPU (sending side) processing time = S
T
CHAPTER 13 FUNCTIONS ACCESSED VIA A NETWORK MODULE
Q24DHC-V Q24DHC-VG
Calculated
vs. LS
value
Normal value
Max. value
Normal value
> LS
T
Max. value
Normal value
< LS
T
Max. value
Normal value
> LS
T
Max. value
Normal value
< LS
T
Max. value
Normal value
> LS
T
Max. value
Normal value
< LS
T
Max. value
R
*1
(Page 244, Section 13.5.1 (1))
*1*2
Q24DHC-LS Q26DHC-LS Q12DC-V
Transmission delay time [ms]
P + LS  0.5 + P
T R
P + LS + P
T R
P  1.5 + LS  0.5 + P
T R
P  2 + LS + P
T R
P + LS + P
T R
P + LS  2 + P
T R
P + LS  0.5 + P
T R
P + LS + P
T R
P + LS + P
T R
P + LS  2 + P
T R
P  1.5 + LS  0.5 + P
T R
P  2 + LS + P
T R
P + LS + P
T R
P + LS  2 + P
T R
 0.5
13
 0.5
 0.5
 0.5
 0.5
 1.5
 2
 1.5
 2

+
T T
*1
245