Mitsubishi Electric MELSEC iQ-R Series User Manual page 121

Data communication settings
The following shows the settings for performing data communication using the fixed scan communication area.
■Use of the setting
To communicate data using the fixed scan communication area, select "Use" for "Fixed Scan Communication Function."
[System Parameter]  [Multiple CPU Setting]  [Communication Setting between CPUs]  [Fixed Scan
Communication Function]
Window
Displayed items
Item
Fixed Scan Communication Function
■Fixed scan communication area setting
Set the send area range (the total of areas used for direct access communication) for each CPU in the fixed scan
communication area. The range of the fixed scan communication area can only be changed in the parameter settings. The
other areas cannot be changed.
[System Parameter]  [Multiple CPU Setting]  [Communication Setting between CPUs]  [Fixed Scan
Communication Area Setting]
Window
Displayed items
Item
Total [K Word]
PLC No.1 [Start XY: U3E0]
PLC No.2 [Start XY: U3E1]
PLC No.3 [Start XY: U3E2]
PLC No.4 [Start XY: U3E3]
*1 The maximum area size which can be set in the fixed scan communication area setting varies depending on the fixed scan interval.
(Page 121 Fixed scan interval setting)
Fixed scan communication
cycle
0.10 ms
0.15 ms
Other than above
Description
Set whether to 'Use' or 'Not Use' other PLC and data communication
function (fixed scan communication function) regularly in specified
interval.
PLC which using fixed scan communication function should be set as
same.
Description
The total value is displayed.
Set the send area size for CPU No.1.
Set the send area size for CPU No.2.
Set the send area size for CPU No.3.
Set the send area size for CPU No.4.
Maximum area size which can be set in the fixed scan communication area
12K words
20K words
24K words
Setting range
• Not Use
• Use
Setting range
Entire system: 0 to
*1
24K words
0 to 12K words
12 BUS ACCESS FUNCTION
12.2 Data Communication Between CPU Modules
12
Default
Not Use
Default

0 K word
119