Transmission Delay Time Of Cyclic Transmission - Mitsubishi Electric MELSEC iQ-R Series User Manual

Transmission delay time of cyclic transmission

The following explains the transmission delay time of cyclic transmission.
A cyclic transmission delay time indicates a time taken until changed data is transmitted to a target station.
• Transmission delay time: Sequence scan time on sending side + link scan time + sequence scan time on receiving side
For a MELSECWinCPU module, a transmission delay time can be calculated by a link refresh time and a refresh cycle
because the module does not have a sequence scan.
Precautions
A cyclic transmission delay time indicates a time shown below. It does not include the processing delay time caused by a user
program.
• This product is on the sending side: A time taken from when data is written to the devices of this product to when the data
is applied to the devices of a target station
• This product is on the receiving side: A time taken from when data is written to the devices of a target station to when the
data is applied to the devices of this product
CC-Link IE Controller Network
For the calculation formula of a transmission delay time on CC-Link IE Controller Network, refer to the following:
MELSEC iQ-R CC-Link IE Controller Network User's Manual (Application)
When a MELSECWinCPU module is set as a target module on the sending or receiving side, replace 'sequence scan time on
sending side (ST)' and 'sequence scan time on receiving side (SR)' into the following terms:
• LT: Refresh cycle of a MELSECWinCPU module (sending side)
• LR: Refresh cycle of a MELSECWinCPU module (receiving side)
CC-Link IE TSN
For information on the calculation formula for transmission delay time when using CC-Link IE TSN, refer to the following:
MELSEC iQ-R CC-Link IE TSN User's Manual (Application)
With reference to above mentioned manual, substitute the sequence scan time of the master station (SM) and the sequence
scan time of the local station (SL) with the following processing time.
SM, SL = P = R + 
• P: Processing time on a MELSECWinCPU module system
• R: Refresh cycle
• : Link refresh time
CC-Link Network
For information on the calculation formula for transmission delay time when using CC-Link Network, refer to the following:
MELSEC iQ-R CC-Link System Master/Local Module User's Manual (Application)
With reference to above mentioned manual, substitute the sequence scan time of the master station (SM) and the sequence
scan time of the local station (SL) with the following processing time.
SM, SL = P = R + 
• P: Processing time on a MELSECWinCPU module system
• R: Refresh cycle
• : Link refresh time
16 NETWORK MODULE ACCESS FUNCTION
176
16.3 Processing Time