Omron CP - PROGRAMMING MANUAL 05-2007 - Page 504

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Special Math Instructions Section 3-13
Operands N: Number of words
The number of words must be 0001 to FFFF (1 to 65,535 words).
S: First source word
S and S+(N–1) must be in the same data area.
Operand Specifications
Description BCNT(067) counts the total number of bits that are ON in all words between S
and S+(N–1) and places the result in R.
Flags
Precautions An error will occur if N=0000 or the result exceeds FFFF.
Area N S R
CIO Area CIO 0 to CIO 6143
Work Area W0 to W511
Holding Bit Area H0 to H511
Auxiliary Bit Area A0 to A959 A448 to A959
Timer Area T0000 to T4095
Counter Area C0000 to C4095
DM Area D0 to D32767
Indirect DM addresses
in binary
@ D0 to @ D32767
Indirect DM addresses
in BCD
*D0 to *D32767
Constants #0001 to #FFFF
(binary) or &1 to
&65,535
---
Data Registers DR0 to DR15 --- 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
S+(N–1)
R
to
N words
Binary resul
t
Counts the number
of ON bits.
Name Label Operation
Error Flag ER ON if N is 0000.
ON if result exceeds FFFF.
OFF in all other cases.
Equals Flag = ON if the result is 0000.
OFF in all other cases.