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17
PROCESSING TIME
17.3 Effect on Sequence Scanning Time
If data logging, event logging, or the report function are used, they have an effect on the
sequence scan time of the access target CPU.
17.3.1 For high speed data sampling
The following shows the necessary processing time on the access target CPU.
The amount of processing time shown below is the time increase of the sequence scan
time.
(The time increase of the scan time) = (K1 N) +(K2 M) + K3 [us]
N: Total number of device points (the total number of points for all devices specified for
high speed data sampling)
M: Number of high speed data sampling settings
(Total number of data logging, event logging, and report settings in which high speed data
sampling is specified)
K1, K2, K3: Constants (Refer to the table below)
Constants to be used in the calculation formula for the time increase of the scan time
1
Constant
name
K1
K2
K3
Q04/06/10/13/20/26/50/100UD(E)HCPU
Data
sampling
Base unit
*1
method
Not
Main
consecutive
Extension
Main
Consecutive
Extension
Not
Main
consecutive
Extension
Main
Consecutive
Extension
Not
Main, extension
consecutive
Consecutive
Main, extension
*1: Method specified in the data logging, event logging, report sampling settings
Not consecutive: "Sampling is made on a consecutive series of devices" not selected
Consecutive: "Sampling is made on a consecutive series of devices" selected
*2: Type of base unit where the high speed data logger module is mounted
Main: main base unit
Extension: extension base unit
Internal device
*2
Bit
Word
1.13
1.10
1.65
1.63
0.59
0.33
1.09
0.86
50
52
60
66
45
40
67
54
40
37
65
45
17.3 Effect on Sequence Scanning Time
17.3.1 For high speed data sampling
Target device
File register
Standard
Memory card
RAM
1.35
1.50
1.90
2.05
0.35
0.42
0.85
0.85
52
50
65
63
40
42
55
58
34
39
48
51
17
17
18
A
I
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