Allen-Bradley MicroLogix 1400 - Page 235

Publication 1766-RM001A-EN-P - October 2008
Math Instructions 233
XPY Instruction Operation
Inputs Conditions Output
Source A
Type
Source B
Type
Destination
Type
S:2/14 S:0/3-0
S, Z, V, C
S:5/0 Destination
W,DW, F W,DW, F F X Source A > 0 &&
(A)**(B) is +NRM
0,0,0,0 L (A)**(B)
W,DW, F W,DW, F F X Source A > 0 &&
(A)**(B) is +DNRM
0,1,0,0 L 0
W,DW, F W,DW, F W X Source A > 0 &&
0.5 <= (A)**(B) < 32767.5
0,0,0,0 L Rnd((A)**(B))
W,DW, F W,DW, F DW X Source A > 0 &&
0.5 <= (A)**(B) < 2147483647.5
0,0,0,0 L Rnd((A)**(B))
W,DW, F W,DW, F W, DW X Source A > 0 &&
(A)**(B) < 0.5
0,1,0,0 L 0
W,DW, F DNRM W,DW, F X (A)**(B) is not DNRM 0,0,0,0 L 1
W,DW, F W,DW, F F X Source A < 0 &&
Source B = 1
1,0,0,0 L Source A
DNRM W,DW, F W,DW, F X Source B > 0 0,1,0,0 L 0
W,DW, F W,DW, F F X Source A < 0 &&
Source B is even integer
0,0,0,0 L (A)**(B)
W,DW, F W,DW, F F X Source A < 0 &&
Source B is odd integer
1,0,0,0 L (A)**(B)
W,DW, F W,DW, F F X Source A > 0 &&
(A)**(B) floating point overflow
0,0,1,0 1 +INF
W,DW, F W,DW, F F X Source A < 0 &&
Source B is odd integer &&
(A)**(B) floating point overflow
1,0,1,0 1 -INF
W,DW, F W,DW, F W X Source A > 0 &&
(A)**(B) > 32767.5
0,0,1,0 1 32767
DNRM DNRM F X X 0,0,1,0 1 0x7FFFFFFF
DNRM DNRM W X X 0,0,1,0 1 32767
DNRM DNRM DW X X 0,0,1,0 1 2147483647
DNRM W,DW, F F X Source A < 0 0,0,1,0 1 0x7FFFFFFF
W,DW, F W,DW, F F X Source A < 0 &&
Source B is not integer value
1,0,1,0 1 Abs(Source A) ** (Source B)
W,DW, F W,DW, F F X Source A = NAN or
Source B = NAN
0,0,1,0 1 0x7FFFFFFF
W,DW, F W,DW, F F X (A = INF && B >=0 ) or
((A<=-1 or A>1) and (B=+INF)) or
(-1<=A<1 and B=-INF)
0,0,1,0 1 0x7FFFFFFF
W,DW, F W,DW, F F X (A = INF and (B < 0 or B = -INF)) or
(abs(A)>1 and B = -INF) or
(abs(A)<1 and B=+INF)
0,1,1,0 1 0
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