Mitsubishi Electric MELSEC iQ-R Series User Manual page 720

Prolonged time of END processing when executing each function
This section describes the prolonged time of END processing when executing each function.
■Latch processing time
If the latch function is used and the range for the latch time setting is effective, the scan time becomes longer. Also when the
time setting is configured for the latch time setting, the scan time may be prolonged in the next END processing after the
specified time has passed. The increase in scan time when the latch range is set can be calculated by the following formula.
Increase in scan time[s] = (KM1  Number of settings of latch range setting
latch specified  16 + Number of points of word device with latch specified + Number of points of double word device with
latch specified  2)) + KM3
*1 The latch range (1) and the latch range (2) are counted as different device types.
Condition
When set to "each scan"
When set to "hour"
■Data logging function
When the data logging function is executed, the scan time becomes longer. The increase in scan time can be calculated by
the following formula.
Increase in scan time [s] = KM1 + (KM2  Number of data logging settings) + (KM3  Number of device points of internal
*1
device )
*1 This indicates the total number of points of data logging setting No.1 to No.10.
Condition
When all the columns are outputted under
the condition of file format of Unicode text file
■Processing time when file register is used
When "Use File Register of Each Program" has been set through setting the file register, the scan time becomes longer. The
increase in the scan time [ms] is given by: the number of program files  0.016.
When "Use Common File Register in All Programs" has been set, the scan time may not become longer.
■File batch online change
When the file batch online change is executed, the scan time becomes longer. The increase in scan time [ms] can be
calculated by the following formula.
Condition
When SM388 is off
(Program file only)
When SM388 is on
(Program file/FB file/global label setting file)
*1 This indicates the number of program files that are written to the CPU module.
*2 This indicates the number of steps in the largest program file among the program files to which the file batch online change is performed.
*3 This indicates the number of program files to which the file batch online change is performed.
*4 This indicates the total number of steps in the program files to which the file batch online change is performed.
The number of steps for each program file can be checked [Confirm Memory Size (Offline)] in [Tool] of the
engineering tool.
APPX
718
Appendix 7 Processing Time
Constant value
KM1 1.00
KM2 0.09
KM3 1.20
KM1 1.0
KM2 0.004
KM3 17.5
Constant value
Process mode
KM1 35
KM2 37
KM3 0.35
Calculation formula
*1
(KM1  Number of program files
KM3
(KM4  Number of program files to be written
*4
programs )
*1
) + (KM2  (Number of points of bit device with
Redundant mode
) + (KM2  Number of steps in the largest program
*3
) + (KM5  Total number of steps in
Constant value
*2
) + KM1: 0.018
-3
KM2: 0.06  10
KM3: 0.9
KM4: 2.34
-3
KM5: 0.06  10