201
DB+, DB+P, DB-, DB-P
1
2
3
4
6
7
8
6.2 Arithmetic Operation Instructions
6.2.6 DB+, DB+P, DB-, DB-P
When two data are set (( +1, )+( +1, ) ( +1, ), ( +1, )-( +1, ) ( +1, ))
: Data for adding/subtracting or head number of the devices where the data for adding/subtracting is stored (BCD 8 digits)
: Head number of the devices where the data to be added to/subtracted from is stored (BCD 8 digits)
Function
DB+
(1) Adds the BCD 8-digit data designated by and the BCD 8-digit data designated by , and stores the result of the
addition at the device designated by .
(2) 0 to 99999999 (BCD 8 digits) can be assigned to and .
(3) If the result of the addition operation exceeds 99999999, the upper bits will be ignored.
The carry flag in this case does not go ON.
DB-
(1) Subtracts the BCD 8-digit data designated by and the BCD 8-digit data designated by , and stores the result of the
subtraction at the device designated by .
(2) 0 to 99999999 (BCD 8 digits) can be assigned to and .
(3) The following will result if an underflow is generated by the subtraction operation: The carry flag in this case does not go
ON.
6.2.6 DB+, DB+P, DB-, DB-P BCD 8-digit addition and subtraction op erations
6.2.6
DB+, DB+P, DB-, DB-P
Setting
Data
Internal Devices
R, ZR
J\
U\G
Zn
Constants
K, H
Other
Bit Word Bit Word
––
–– ––
Basic
Process
High
performance
Redundant
Universal
LCPU
D D
S S
D D D D
S S
D D
Command
Command
P
S D
S D
DB+, DB-
DB+P, DB-P
DB+/DB-
indicates an instruction symbol of .
S
D
S
D
D
S
D
00 323456
(Upper 4 digits) (Lower 4 digits)
90871068
(Upper 4 digits)
(Lower 4 digits)
01 194524
(Upper 4 digits)(Lower 4 digits)
Digits exceeding the designated number
of digits are assumed to be 0.
D SD S D D
S
D
10 65432199 000000 00654321
D
S
D
00 3234
5
6
(Upper 4 digits) (Lower 4 digits)
908
7
1068
(Upper 4 digits) (Lower 4 digits)
9 547
6
12
(Upper 4 digits) (Lower 4 digits)
+1+1 +1
Digits exceeding the designated number
of digits are assumed to be 0.
D SD S D D
0
S
D
21 34567921345678 99 999999
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