Omron SYSMAC CJ - REFERENCE MANUAL 08-2008 Reference Manual page 1316

Model Conversion Instructions (Unit Ver. 3.0 or Later)
Description
Flags
Precautions
Example
1276
Area
DM Area
EM Area without bank
EM Area with bank
Indirect DM/EM
addresses in binary
Indirect DM/EM
addresses in BCD
Constants
Data Registers
Index Registers
Indirect addressing
using Index Registers
BCNTC(621) counts the total number of bits that are ON in all words between
S and S+(N–1) and places the BCD result in R.
S+(N–1)
Name
Error Flag ER
Equals Flag =
Note In C-series PLCs, the BIT COUNTER (BITC) instruction will cause the Error
Flag to go ON if the content of an indirectly addressed DM word (*DM) is not
BCD, or the DM area boundary is exceeded. BCNTC(621) will not cause the
Error Flag to go ON in these cases.
An error will occur if N is not BCD between 0001 and 9999, or the result
exceeds 9,999.
When CIO 000000 is ON in the following example, BCNTC(621) counts the
total number of ON bits in the 10 words from CIO 0100 through CIO 0109 and
writes the result to D00100.
N
D00000 to D32767
E00000 to E32767
En_00000 to En_32767
(n = 0 to C)
@ D00000 to @ D32767
@ E00000 to @ E32767
@ En_00000 to @ En_32767
(n = 0 to C)
*D00000 to *D32767
*E00000 to *E32767
*En_00000 to *En_32767
(n = 0 to C)
#0001 to #9999
(BCD)
DR0 to DR15
---
,IR0 to ,IR15
–2048 to +2047 ,IR0 to –2048 to +2047 ,IR15
DR0 to DR15, IR0 to IR15
,IR0+(++) to ,IR15+(++)
,–(– –)IR0 to, –(– –)IR15
N words
Counts the number
to
of ON bits.
Label
ON if N is not within the range 0001 to 9999 BCD.
ON if result exceeds 9999 BCD.
OFF in all other cases.
ON if the result is 0000.
OFF in all other cases.
Section 3-35
S
---
--- DR0 to DR15
BCD result
R
Operation
R