Panasonic FP-E Programming Manual page 910

High−level Instructions
If S2 specifies a higher word of double word data, processing will take place over the same area as if the lower
word had been specified.
Double word data table
Lower word
S1: 0
Higher word
S1+1:
S1+2: 1
S1+3:
Lower word
S2−1: n
Higher word
S2:
Decimals of the average value are rounded off so that the average value is an integer.
Precaution during programming
Even if D + 5 overflows the selected area, it will still be stored, and this may corrupt the data in the leading part
of the other area. (An area overflow check is not performed.)
Flag conditions
・Error flag (R9007):
・Error flag (R9008):
・Carry flag (R9009): Turns on for an instant when overflows/underflows while calculating.
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Specified areas
Turns on and stays on when:
Turns on for an instant when:
− The area specified using the index modifier exceeds the limit.
− S1 > S2.
− The areas of S1 and S2 are different.