Panasonic FP-E Programming Manual page 968

High−level Instructions
Program example
The "f1.6094379" is stored to DT20 and DT21 when the R0 turns on.
R0
F320 LN, K 5, DT20
The "f−0.3160815" is stored to DT30 and DT31 when the R0 turns on.
R0
F320 LN, f0.729, DT30
Precaution during programming
For FP0, this instruction F320 (LN) cannot be programmed in the interrupt program.
Flag conditions
・Error flag (R9007):
・Error flag (R9008):
・= flag (R900B):
・Carry flag (R9009): Turns on for an instant when the result is overflowed.
3 − 704
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Turns on and stays on when:
Turns on for an instant when:
− The area specified using the index modifier exceeds the limit.
− If data other than real number data is specified in S+1 and S.
− The S+1 and S is not greater than zero.
− If result of processing is outside integer range when integer device is
specified in D+1 and D.
Turns on when result of processing is recognized as "0."