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APPENDICES
APPEN
DIX
Appendix
2
CP
U M
odule P
roces
sing T
ime
Appendix
2.
2
F
a
ctor
s t
hat
I
n
creas
e
t
he S
can
T
im
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Appendix 2.2
Factors that Increase the Scan Time
When any of the function or operation described below is executed, the scan time is increased by the amount of its
processing time.
(1) Batch transfer to the program memory
Use the following expression to calculate the increased scan time when data are batch transferred to the program
memory.
[Time required for batch-transferring data to the program memory]
Scan time × KM1 + KM2 [s]
(2) Use of local devices
Use the following expression to calculate the increased scan time when local devices are used.
[Increase in the scan time]
((N1 × KM1) + ((N2 + N3/16)) × KM2) + (N4 × KM3) + KM4) × n + KM5 [µs]
• N1: Number of device types that specified a local device
• N2: Number of word device points
• N3: Number of bit device points
• N4: Number of index register points that were specified as a local device
• n: Number of programs where local devices are set to be used
Use the following expression to calculate the increase in scan time when local devices are used in a subroutine
program (only when the subroutine program is called from another file).
[Increase in the scan time]
(N1 × KM1) + ((N2 + (N3/16)) × KM2) + (N4 × KM3) + KM4 [µs]
• N1: Number of device types that specified a local device
• N2: Number of word device points
• N3: Number of bit device points
• N4: Number of index register points that were specified as a local device
• n: Number of programs where local devices are set to be used
CPU module
KM1
KM2
L02CPU
170.0
1.0
L26CPU-BT
1100.0
15.0
CPU module
KM1
KM2
KM3
KM4
KM5
L02CPU
8.0
0.22
0.65
58.0
14.2
L26CPU-BT
8.0
0.10
0.68
35.5
17.3
CPU module
KM1
KM2
KM3
KM4
L02CPU
16.0
0.44
1.30
80.0
L26CPU-BT
16.0
0.20
1.36
100.0
Содержание L02CPU
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