0000
00
(167)
SUM #4010 D00000 D00100
322
5-23-3 SUM: SUM(167)
Variations
j SUM(167)
(167)
SUM C R
1
D
R
1
: 1
st
word in range CIO, G, A, T, C, DM
D: 1
st
destination word CIO, G, A, DM
C: Control word CIO, G, A, #, DM, DR, IR
Operand Data AreasLadder Symbol
When the execution condition is OFF, SUM(167) is not executed. When the ex-
ecution condition is ON, SUM(167) computes the sum of the contents of words
from R
1
to R
1
+N–1 and outputs that value to the destination words (D and D+1).
The number of words within the range (N) is contained in the 3 rightmost digits of
C, which must be BCD between 001 and 999.
When bit 15 of C is OFF, data within the range is treated as unsigned binary and
when it is ON the data is treated as signed binary. Refer to
3-2 Data Area Struc-
ture
for information on signed and unsigned binary data.
When bit 14 of C is OFF, data within the range is treated as BCD and when it is
ON the data is treated as binary. The data will be treated as BCD when bit 14 is
OFF, even if bit 15 is ON, indicating signed binary data.
15 14 13 12 11 00
Data type
1 (ON): Binary
0 (OFF): BCD
Number of words
in range (N)
Not used – set to zero.
Data type
1 (ON): Signed binary
0 (OFF): Unsigned binary
C:
The 3 rightmost digits of C must be BCD between 001 and 999.
R
1
and R
1
+N–1 must be in the same data area.
If bit 14 of C is OFF (setting for BCD data), all data within the range R
1
to R
1
+N–1
must be BCD.
Note Refer to page 115 for general precautions on operand data areas.
Flags ER (A50003): The 3 rightmost digits of C are not BCD between 001 and 999.
Bit 14 of C is OFF, indicating BCD data, but the content of a
word within the range is not BCD.
Content of *DM word is not BCD when set for BCD.
EQ (A50006): The result is zero.
N (A50008): Shows the status of bit 15 of D+1.
Example When CIO 000000 is ON in the following example, SUM(167) computes the sum
of the contents of the words within the 10-word range from D00000 to D00009
and outputs that value to D00100 and D00101. The data is treated as unsigned
binary data because the leftmost digit of the control word is 4.
Address Instruction Operands
00000 LD 000000
00001 SUM(167)
#4010
D00000
D00100
Description
Precautions
Special Math Instructions Section 5-23
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