Mitsubishi QCPU (Q Mode) User Manual

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MELSEC-Q
7 FUNCTION
POINT
If a step between the AND/OR blocks is specified as a monitor condition, monitor
data is sampled when the status previous to execution of the specified step is
specified by the LD instruction. The monitor timing depends on the step specified
as a monitor condition. The following shows examples of monitoring when the 2nd
step is ON (Step No. [ 2] = <ON>).
(1) When the 2nd step is connected by the AND instruction:
As shown below, the monitor execution condition is established when both "X0"
and "X1" are ON.
0
Y20
X0 X1 X2
2nd step
0 LD X0
1 AND X1
2 AND X2
3 OUT Y20
Circuit mode List mode
(2) When the 2nd step is connected between the AND/ON blocks:
As shown below, the monitor execution condition is established when "X1" is
ON. Whether "X0" is ON or OFF, it does not affect the monitor execution
condition.
0
Y20
X0 X1 X2
2nd step
X3
0 LD X0
1 LD X1
2 AND X2
3 OR X3
4 ANB
5 OUT Y20
(3) If the beginning of a ladder block not at Step 0 is specified in Step No. as a
detailed condition, monitor data is collected when the execution status of the
instruction immediately before execution becomes the specified status. If (Step
No. [ 2] = <ON>) is specified in the following ladder, monitor data is collected
when OUT Y10 turns ON.
0
Y10
X0
0 LD X0
1 OUT Y1
0
2 LD X1
3 OUT Y11
Y11
X1
2
(b) When only "Device" is specified:
"Word Device" or "Bit Device" can be specified.
1) When "Word Device " is selected:
The monitor data is sampled is when the current value of the specified
word device becomes the specified value.
Type a current value in decimal digits or hexadecimal digits.
2) When "Bit Device" is specified:
The monitor data is sampled is when the execution status of the
specified bit device becomes the specified value.
Either the leading edge or the fall can be specified for execution
condition.
(c) When "Step No." and "Device" is selected:
The monitor data is sampled when the status previous to execution of the
specified status or the status (current value) of the specified bit device
(word device) is specified.

Mitsubishi QCPU (Q Mode) Specifications

General

Brand	Mitsubishi
Model	QCPU (Q Mode)
Category	Controller
Language	English