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CHAPTER10 CPU MODULE PROCESSING TIME
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10.1 Scan Time
10.1.2 Time required for each processing included in scan time
(d) Auto refresh with an intelligent function module
This is the time required for refreshing data between the buffer memory of an intelligent function module and
devices in the CPU module.
Use intelligent function module utility package (GX Configurator) for auto refresh settings.
Calculation method
Use the following expression to calculate the auto refresh time with an intelligent function module.
(Refresh time) = KN1 + KN2 (number of refresh points)
For KN1 and KN2, use the values given in Table10.8 and Table10.9.
When the number of auto refresh points for the analog-digital converter module (Q64AD)
is 4 points (when the module is mounted on the Q26UDHCPU main base unit)
Table10.8 When an intelligent function module is mounted on the main base unit
CPU module KN1 KN2
Q00UJCPU, Q00UCPU, Q01UCPU
96.3 s 6.7 s
Q02UCPU
23 s 6 s
Q03UDCPU, Q03UDECPU
6 s 5 s
Q04UDHCPU, Q06UDHCPU, Q10UDHCPU, Q13UDHCPU, Q20UDHCPU,
Q26UDHCPU, Q04UDEHCPU, Q06UDEHCPU, Q10UDEHCPU, Q13UDEHCPU,
Q20UDEHCPU, Q26UDEHCPU
4 s 5 s
Table10.9 When an intelligent function module is mounted on the extension base unit
CPU module KN1 KN2
Q00UJCPU 79.7 s 8.9 s
Q00UCPU, Q01UCPU
79.7 s 8.1 s
Q02UCPU
45 s 7.0 s
Q03UDCPU, Q03UDECPU
7 s 6.0 s
Q04UDHCPU, Q06UDHCPU, Q10UDHCPU, Q13UDHCPU, Q20UDHCPU,
Q26UDHCPU, Q04UDEHCPU, Q06UDEHCPU, Q10UDEHCPU, Q13UDEHCPU,
Q20UDEHCPU, Q26UDEHCPU
5 s 6 s
0.029 (ms) = 0.005 + 0.006 4
Example