Appendix 3 Processing Time; Transmission Delay Time - Mitsubishi Electric MELSEC iQ-R Series User Manual

Appendix 3

Transmission delay time

The following are the formulas to calculate transmission delay time of I/O data exchange.
Note that the processing time may be prolonged depending on the load ratio of the network (line congestion degree),
processing performance of connected devices, and the system configuration.
Transmission delay time of output data
The following time is shown:
• The time between the CPU module device turning on or off and the output of the IO device turned on or off
• The time between data set to the CPU module device and the data output to the IO device
Calculation value Not using the refresh settings
Normal value CT
Maximum value CT2
*1 The time to update 'Output data area' (Un\G31000 to Un\G35095) and 'Input data area' (Un\G36000 to Un\G40095).
The data transfer between the devices of the I/O data and the CPU module is performed on the program. The processing time is not
included in the calculation formula because the processing time varies depending on the programming method and the program
execution type.
*2 The time to update the CPU module device set in the refresh settings.
CT: Cycle time [ms] ( Page 86 [Parameters] tab)
ST: Sequence scan time [ms] ( MELSEC iQ-R CPU Module User's Manual (Application))
Transmission delay time of input data
The following time is shown:
• The time between a signal input to the IO device and the CPU module device turned on or off
• The time between data input to the IO device and the data stored in the CPU module device
Calculation value Not using the refresh settings
Normal value CT
Maximum value CT2
*1 The time to update 'Output data area' (Un\G31000 to Un\G35095) and 'Input data area' (Un\G36000 to Un\G40095).
The data transfer between the devices of the I/O data and the CPU module is performed on the program. The processing time is not
included in the calculation formula because the processing time varies depending on the programming method and the program
execution type.
*2 The time to update the CPU module device set in the refresh settings.
CT: Cycle time [ms] ( Page 86 [Parameters] tab)
ST: Sequence scan time [ms] ( MELSEC iQ-R CPU Module User's Manual (Application))
Processing Time
*1
*1
*2
Using the refresh settings
CT+ST
(CT2)+ST
*2
Using the refresh settings
STCT ST>CT
CT+ST ST
(CT2)+ST ST2

Appendix 3 Processing Time

A
APPX
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