Mitsubishi MELSEC QCPU Programming Manual page 241

6 BASIC INSTRUCTIONS
[Operation Errors]
(1) In the following cases an operation error occurs, the error flag (SM0) turns ON, and an error
code is stored at SD0.
• The device range n-points from
• The number of transfers exceeds 6144 when a special direct device is used. (QnACPU)
[Program Example]
(1) The following program outputs the lower 4 bits of D0 when XA goes ON to Y10 to Y23 in 4-bit
units.
[Ladder Mode]
D0
(2) The following program outputs the data at X20 through X23 to D100 through D103 when XA
goes ON.
[Ladder Mode]
Before execution
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D
b15 b4 b3 b2 b1
1 1 0 1 1 0 1 1 1 0 0 1 1 0 1 1
Ignored
Transmission
X2F X2C X2B X28 X27 X24 X23
1 0 1 1 0 1 1 1 0 0 1 0 1 1 1 0
Ignored
exceeds the device range.
[List Mode]
Steps Instruction
b0
1 0 1 1 Y13 to Y10
1 0 1 1 Y17 to Y14
1 0 1 1 Y1B to Y18
1 0 1 1 Y1F to Y1C
1 0 1 1 Y23 to Y20
[List Mode]
Instruction
Steps
X20
After execution (transfer destination)
b15 b4 b3
0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0
0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0
0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0
0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0
Becomes 0
MELSEC-Q/QnA
(Error code: 4101)
(Error code: 4101)
Device
5 points
Device
b0
D100
D101
4 points
D102
D103
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