11
CPU MODULE PROCESSING TIME
11.1 Scan Time
11.1.4 Factors that can shorten scan time by changing the settings
11 - 28
9
Parameters
10
Device Explanation
11
CPU Module Processing
Time
12
Procedure for Writing
Program to CPU ModuleAppendicesIndex
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 ( Section 9.1.2(2))
Note11.20
Note21
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
Note11.20
Redundant
Universal
UD
Note11.20 Note11.20
Remove checkmark!