Mitsubishi Electric Q01UCPU User Manual page 182

(5) Precautions
(a) Measurement range setting
Set the measurement range so that "Start step < End step" is satisfied.
(b) Minimum unit of measurement time
The minimum unit of measurement time is 0.01ms.
If the measurement time is less than 0.01ms, 0.000ms is displayed.
(c) When steps are specified between the FOR and NEXT instructions
Scan time required to execute the program between the specified steps is measured.
(d) When only the start step is specified between the FOR and NEXT instructions
• CPU modules other than the High-speed Universal model QCPU
Since the start step is executed repeatedly, scan time cannot be measured. (Time values are not updated
on the Scan Time Measurement window of a programming tool.)
• High-speed Universal model QCPU
The High-speed Universal model QCPU recognizes only the first start step and ignores the second and
later start steps. Scan time required to execute the program between the first start step and the end step is
measured.
(e) When scan time cannot be measured
Scan time cannot be measured for scans executed across multiple program files.
Scan time is not updated on the Scan Time Measurement screen in the following case.
• When the branch instruction is specified to the end step
The JMP instruction is specified to the end step.
Ex.
180
3
6
8
Since the start step is specified
between the FOR and NEXT
instructions, it will be executed
10
repeatedly.
11
0
Start step: 3
3
5
7
P0
10
FOR K2
Start step: 8
NEXT
End step: 13
End step: 6
JMP P0