LS Industrial Systems XBC-DN10E, Руководство пользователя

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Chapter 6 Instruction and Flag List
XBC E-Type Main Unit 6-216 Ver. 1
6.32.13 SUM, SUMP, DSUM, DSUMP
Instruction
Area Available
Step
Flag
P M K F L T C S Z D.x R.x
Con
st
U N D R
Error
(F110)
Zero
(F111)
Carry
(F112)
SUM(P)
DSUM(P)
S O O O O O O O - O - - - O O O O
4~6 O O O D O O O - O O O - O - - - O O O O
N O O O - O O O - O - - O O O O O
[Flag Setting]
Flag Description Device Number
Error To be set if N exceeds applicable device’s range, or overflow occurs during operation. F110
Zero To be set if operation result is 0. F111
Carry To be set if overflow occurs during operation. F112
1) SUM (Word Summary)
(1) Saves the result of the sum up to N data starting from word data S in D.
(2) Sum will be performed by Signed operation.
(3) If operation result is Zero, Zero Flag will be set.
(4) If overflow occurs during operation, Carry Flag and Error Flag will be set.
(5) The operated value will be saved in result despite the overflow. Thus, Carry Flag should be checked since
unintentional value could be saved in result.
(6) If N=0, the instruction will not be executed.
Operand Description Data Type
S Data address to start SUM operation INT/DINT
D Address to save operation result. INT/DINT
N Number of words to execute SUM operation starting from S WORD
(D)SUM
means (D)SUM
P S D
(D)SUMP
S D N
N
n
Address to start operation
123
10
500
123
20
-123
123
123
899
D
S
S + 1
S + 2
S + 3
S + (n-4)
S + (n-3)
S + (n-2)
S + (n-1)
Sum