2 PARAMETER SETTINGS
2.5 Refresh Setting
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Refresh processing time
A refresh processing time [s] is a constituent of the scan time of the CPU module. For details on the scan time, refer to the
following.
MELSEC iQ-R CPU Module User's Manual (Application)
The refresh processing time [s], which is taken for refresh, is given by:
• Refresh processing time [s] = Refresh read time (time for transferring refresh data to the CPU module)
The refresh read time varies depending on the settings of "Target".
With the inter-module synchronization function used, the refresh read time is also added to the execution time of an inter-
module synchronous interrupt program.
When "Target" is a module label or a refresh data register (RD)
The following table shows the refresh read time with an RCPU used.
When "Target" is a specified device
Calculate the refresh read time according to the number of items and the number of their transfer data (word) that are set to
be refreshed. For the calculation method, refer to the following.
MELSEC iQ-R CPU Module User's Manual (Application)
Classification When using the refresh settings When using the inter-module synchronization
function
Set to CH1
only
Set to CH2
only
Set to CH1 and
CH2
Set to CH1
only
Set to CH2
only
Set to CH1 and
CH2
Refresh read time 15.07s 15.07s18.63s15.63s 15.63s15.83s
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