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6 BASIC INSTRUCTIONS
6.2 Arithmetic Operation Instructions
B+(P), B-(P) [When three data are set]
■B+
• Adds the BCD 4-digit data designated by (S1) and the BCD 4-digit data designated by (S2), and stores the result of the
addition at the device designated by (D).
• 0 to 9999 (BCD 4 digits) can be assigned to (S1), (S2) and (D).
• If the result of the addition operation exceeds 9999, the higher bits are ignored. The carry flag (SM700) in this case does
not turn ON.
■B-
• Subtracts the BCD 4-digit data designated by (S1) and the BCD 4-digit data designated by (S2), and stores the result of the
subtraction at the device designated by (D).
• 0 to 9999 (BCD 4 digits) can be assigned to (S1), (S2) and (D).
• The following will result if an underflow is generated by the subtraction operation: The carry flag (SM700) in this case does
not turn ON.
• In any of the following cases, an operation error occurs, the error flag (SM0) turns ON, and an error code is stored into SD0.
(S1): Data to be added to/subtracted from or head number of the devices where the data to be added to/subtracted from is stored (BCD 4 digits)
(S2): Data for adding/subtracting or head number of the devices where the data for adding/subtracting is stored (BCD 4 digits)
(D): Head number of the devices where the operation result will be stored (BCD 4 digits)
Setting
data
Internal device R, ZR J\ U\G Zn Constant
K, H
Others
Bit Word Bit Word
(S1)
(S2)
(D)
Error
code
Error details Q00J/
Q00/
Q01
QnH QnPH QnPRH QnU LCPU
4100 The (S1) or (S2) BCD data is outside the 0 to 9999 range.
Command
Command
P
B+, B-
B+P, B-P
S1
S2
D
S1
S2
D
B+/B-
indicates an instruction symbol of .
Digits exceeding the designated
number of digits are assumed to be 0.
4
0
44
2
03
4
6078
S1
D
S2
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