Omron CJ - INSTRUCTIONS REFERENCE MANUAL 07-2009 Reference Manual page 574

3. Instructions
Function
PWRD(860) raises the double-precision (64-bit) floating-point number in words B to B+3 to the power of
the double-precision (64-bit) floating-point number in words E to E+3. In other words, PWR(840)
calculates XY (X = content of B to B+3; Y = content of E to E+3).
Exponent data
S2+3 S2+2 S2+1 S2
S1+3 S1+2 S1+1 S1 D+3 D+2 D+1 D
Base data
For example, when the base words (B to B+3) contain 3.1 and the exponent words (E to E+3) contain 3,
the result is 3.13 or 29.791.
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CS/CJ/NSJ Series Instructions Reference Manual (W474) 537