11
CPU MODULE PROCESSING TIME
11.1 Scan Time
11.1.4 Factors that can shorten scan time by changing the settings
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11.1.4 Factors that can shorten scan time by changing the settings
The scan time can be shortened by changing the PLC parameter settings of GX Developer
described in this section.
(1) A series CPU compatibility setting (
The scan time can be shortened by the processing time indicated in Table11.32 by
selecting "Do not use special relays/special registers SM1000/SD1000 and later"
(removing the check mark on the setting screen) in the PLC system setting.
POINT
After selecting "Do not use special relays/special registers SM1000/SD1000 and
later" (removing the check mark on the setting screen), replace the following A
series compatible special relays with the Q series dedicated special relays.
• A series compatible special relays (SM1000 to 1299)
Q series dedicated special relays (SM0 to 999)
• A series compatible special registers (SD1000 to 1299)
Q series dedicated special registers (SD0 to 999)
Note21
Table11.32 Processing time for each A series CPU module model
CPU module
Processing time
Q02CPU
0.07ms
Q02HCPU, Q06HCPU, Q12HCPU, Q25HCPU,
Q02PHCPU, Q06PHCPU, Q12PHCPU, Q25PHCPU
0.03ms
Figure 11.7 A series CPU compatibility setting
Basic
Redundant
Note11.20
Universal
UD
Note11.20 Note11.20
The Basic model QCPU, Redundant CPU and Universal model QCPU do not support the A
series CPU compatibility setting.
Basic
Redundant
Universal
UD
Remove checkmark!