Panasonic FP-E Programming Manual page 529

Example: When the writing pointer has made one complete cycle
Reading
pointer ▲
Because the number of data items stored in the FIFO buffer
(DT1=5) exceeds the size of the FIFO buffer (DT0=5), the
operation is not executed, and an operation error occurs.
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K 5
DT0
K 5
DT1
DT2
0 0
DT3 K100
K101
DT4
DT5 K102
DT6 K103
DT7
K104
K 5
DT0
K 5
DT1
DT2
0 0
K100
▲DT3
DT4 K101
DT5 K102
K103
DT6
DT7 K104
An error occurs, and processing is not carried out.
0▲
Writing
1
WR0
2
K105
3
4
Execution of F117 (FIFW) instruction
0▲
Writing pointer 1 cycle
1
2
3
4
High−level Instructions
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