Mitsubishi Electric MELSEC Q Series User Manual page 249

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.
Q Corresponding MELSECNET/H Network System Reference Manual (PLC to PLC network)
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 ).
T
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 manual for respective network modules.
Q Corresponding MELSECNET/H Network System Reference Manual (PLC to PLC network)
*2 : Total time for the number of mounted network modules.
Formulas to obtain the transmission delay time applicable when the receiving module is a Q series programmable
controller CPU are listed below.
Block data assurance
Mode
per station
Normal
mode
*1
LS: Link scan time
P : Processing time of the C Controller module (sending side) = R
T
R : Refresh time of the C Controller module (sending side) (Page 175, Section 11.7.3)
T

: Link refresh time of the C Controller module (sending side)
T
Q : Programmable controller CPU (receiving side) processing time = S
R
S : Sequence scan time of the programmable controller CPU (receiving side) (link refresh time not included)
R

: Link refresh time of the programmable controller CPU (receiving side)
R
*1 : For details, refer to the following.
Q Corresponding MELSECNET/H Network System Reference Manual (PLC to PLC network)
*2 : Total time for the number of mounted network modules.
(3) Transmission delay time on CC-Link IE Field Network
For formulas to obtain cyclic transmission delay time in the CC-Link IE Field Network, refer to the following.
MELSEC-Q CC-Link IE Field Network Master/Local Module User's Manual
At that time, use the following processing time instead of "SM: Master station sequence scan time" and "SL: Local
station sequence scan time":

SM, SL = P = R +
P: Processing time of C controller system
R: Link refresh cycle (Page 175, Section 11.7.3)

: Link refresh time (Page 244, Section 13.5.1 (2))
If direct access or buffer memory access are used, it takes no refresh time.
For function processing time, refer to the following.
Page 475, Appendix 5
(4) Transmission delay time on CC-Link
For formulas to obtain cyclic transmission delay time in the CC-Link, refer to the following.
MELSEC-Q CC-Link System Master/Local Module User's Manual
At that time, use the following processing time for buffer memory access functions instead of "SM: Master station
sequence scan time" and "SL: Local station sequence scan time".
For function processing time, refer to the following.
Page 475, Appendix 5
CHAPTER 13 FUNCTIONS ACCESSED VIA A NETWORK MODULE
: Programmable controller CPU (sending side) processing time = S
T
R vs. LS
T
None (None)
When R > LS
T
Valid
When R < LS
T
*1*2
Calculated
Transmission delay time [ms]
value
Normal value P + LS  0.5
T
Max. value P + LS
T
Normal value P  1.5 + LS  0.5
T
Max. value P  2 + LS
T
Normal value P + LS
T
Max. value P + LS  2
T

+
T T
*2
(Page 244, Section 13.5.1 (1))

+
R R
*1*2

+
T T
*1
13
+ Q  1.5
R
+ Q  2
R
+ Q  1.5
R
+ Q  2
R
+ Q  1.5
R
+ Q  2
R
*1
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