Omron SYSMAC CJ - REFERENCE MANUAL 08-2008

568
Special Math Instructions Section 3-14
Description ROOT(072) computes the square root of the 8-digit BCD number in S+1 and
S and outputs the integer portion of the result to R. The non-integer remainder
is eliminated.
Flags
Precautions The operands of this instruction (S+1, S, and R) are all treated as BCD val-
ues. If the input data is binary, use the ROTB(620) instruction.
Examples Square Root of 8-digit Number
When CIO 000000 is ON in the following example, ROOT(072) calculates the
square root of the data in D00001 and D00000, and writes the integer portion
of the result in D00100.
Note Figures after the decimal point are truncated for 8-digit numbers.
Timer Area T0000 to T4094 T0000 to T4095
Counter Area C0000 to C4094 C0000 to C4095
DM Area D00000 to D32766 D00000 to D32767
EM Area without bank E00000 to E32766 E00000 to E32767
EM Area with bank En_00000 to En_32766
(n = 0 to C)
En_00000 to En_32767
(n = 0 to C)
Indirect DM/EM
addresses in binary
@ D00000 to @ D32767
@ E00000 to @ E32767
@ En_00000 to @ En_32767
(n = 0 to C)
Indirect DM/EM
addresses in BCD
*D00000 to *D32767
*E00000 to *E32767
*En_00000 to *En_32767
(n = 0 to C)
Constants #00000000 to #99999999
(BCD)
---
Data Registers --- DR0 to DR15
Index Registers ---
Indirect addressing
using Index Registers
,IR0 to ,IR15
–2048 to +2047 ,IR0 to –2048 to +2047 ,IR15
DR0 to DR15, IR0 to IR15
,IR0+(++) to ,IR15+(++)
,–(– –)IR0 to, –(– –)IR15
Area S R
RS+1 S
BCD data (8 digits) BCD data (4 digits)
Name Label Operation
Error Flag ER ON if the data in S+1 and S is not BCD.
OFF in all other cases.
Equals Flag = ON if the result is 0000.
OFF in all other cases.