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MELSEC-Q
7 FUNCTION
7.11.3 Scan time measurement
(1) What is Scan Time Measurement?
(a) This function displays the set program interval processing time.
(b) To specify a scan time measurement range, follow either of the following
two steps:
• Make the setting on the "Ladder monitor" window.
• Make the setting on the "Scan Time Measurement" dialog box.
(c) The time for the subroutines and interrupt program can be measured as
well.
(d) The time includes the time required for processing sub-routines, when the
sub-routine CALL command is within the range of scan time measurement.
The amount of time required for executing interruption programs and fixed
scan execution type programs is all added to this.
Main
program
Sub-routine
program
Measurement range
Measurement range
(2) Measuring Scan Time
To measure scan time, follow the following steps.
(a) Display the leading edge of the circuit of which scan time to be measured,
and set the monitor mode.
Y20
M0
50
Y21
M1
52
Y22
M2
104
106
END
Содержание QCPU (Q Mode)
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