Rockwell Automation 1785-Lxxx Enhanced and Ethernet PLC-5 Programmable Controllers - Manual (Page 331)

Publication 1785-UM012D-EN-P - July 2005
Instruction Set Quick Reference D-31
Category Code Title Execution Time (
µ
s)
Integer
Execution Time (
µ
s)
Floating Point
Words of
Memory
(1)
True False True False
Arithmetic ADD add 6.1 1.4 14.9 1.4 4-7
SUB subtract 6.2 1.4 15.6 1.4 4-7
MUL multiply 9.9 1.4 18.2 1.4 4-7
DIV divides 12.2 1.4 23.4 1.4 4-7
SQR square root 9.9 1.3 35.6 1.3 3-5
NEG negate 4.8 1.3 6.0 1.3 3-5
CLR clear 3.4 1.1 3.9 1.1 2-3
AVE average file 152+E25.8 30 162+E22.9 36 4-7
STD standard deviation 262+E92.5 34 295+E85.5 34 4-7
TOD convert to BCD 7.8 1.3 3-5
FRD convert from BCD 8.1 1.3 3-5
RAD radian 57.4 1.4 50.1 1.4 3-5
DEG degree 55.9 1.4 50.7 1.4 3-5
SIN sine 414 1.4 3-5
COS cosine 404 1.4 3-5
TAN tangent 504 1.4 3-5
ASN inverse sine 426 1.4 3-5
ACS inverse cosine 436 1.4 3-5
ATN inverse tangent 375 1.4 3-5
LN natural log 409 1.4 403 1.4 3-5
LOG log 411 1.4 403 1.4 3-5
XPY X to the power of Y 897 1.5 897 1.5 4-7
SRT sort file
(5/11, -5/20)
(-5/30, -5/40,
-5/60, -5/80)
276 +
12[E**1.34]
224 +
25[E**1.34]
227
189
278 + 16[E**1.35]
230 + 33[E**1.35]
227
189
3-5
(1) Use the larger number for addresses beyond 2048 words in the controller’s data table.
E = number of elements acted on per scan
SRT true is only an approximation. Actual time depends on the randomness of the numbers.