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CHAPTER6 FUNCTIONS
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6.11 Monitor Function
6.11.1 Monitor condition setting
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● If a step between the AND/OR blocks is specified as a monitor condition, monitor data is collected 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 step 2 is on (Step No. [2] = <ON>).
• When the step 2 is connected by the AND instruction:
In Figure 6.28, the monitor execution condition is established when both X0 and X1 are on.
• When the step 2 is connected in the middle of the AND/OR block:
In Figure 6.29, the monitor execution condition is established when X1 turns on. (The on/off status of X0 does not
affect the establishment of the monitor execution condition.)
• If the start of a ladder block other than the step 0 is specified for the step number 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.
● Be sure to set the condition of the step set as step No.0 to "Always".
Figure 6.28 When the step 2 is connected by the AND instruction
Figure 6.29 When the step 2 is connected in the middle of the AND/OR block
Figure 6.30 When the start of a ladder block other than the step 0 is specified for the step number
0
X0 X1 X2
Ladder mode List mode
Y20
0LD XO
1 AND X1
2 AND X2
3 OUT Y2
Step 2
0
Y20
X0 X1 X2
X3
0LD XO
1LD X1
2 AND X2
3OR X3
4 ANB
5 OUT Y20
Step 2
Ladder mode List mode
0
Y10
X0
2
Y11
X1
Ladder mode List mode
0LD XO
1 OUT Y10
2LD X1
3 OUT Y11