Mitsubishi Electric MELSEC-Q/L - BCD 4-Digit Multiplication and Division Operations

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6 BASIC INSTRUCTIONS
6.2 Arithmetic Operation Instructions
BCD 4-digit multiplication and division operations
B*(P), B/(P)
Processing details
■B*
• Multiplies BCD data designated by (S1) and BCD data designated by (S2), and stores the result in the device designated
by (D).
• 0 to 9999 (BCD 4 digits) can be assigned to (S1) and (S2).
■B/
• Divides BCD data designated by (S1) and BCD data designated by (S2), and stores the result in the device designated by
(D).
• Uses 32 bits to store the result of the division as quotient and remainder
• If (D) has been designated as a bit device, the remainder of the operation will not be stored.
Operation error
• 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 multiplied/divided or head number of the devices where the data to be multiplied/divided is stored (BCD 4 digits)
(S2): Data for multiplying/dividing or head number of the devices where the data for multiplying/dividing is stored (BCD 4 digits)
(D): Head number of the devices where the multiplication/division operation result will be stored (BCD 8 digits)
Setting
data
Internal device R, ZR J\ U\G Zn Constant
K, H
Others
Bit Word Bit Word
(S1)  
(S2)  
(D)  
• Quotient (BCD 4 digits)  Stored at the lower 16 bits.
• Remainder (BCD 4 digits)  Stored at the upper 16 bits.
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.
The divisor is 0.

Basic
Process
High
performance
Redundant Universal LCPU
Command
Command
P
B*
*
, B/
P, B/P
B
S1 S2
D
S1 S2
D
B ,B/indicates an instruction symbol of * .
4
09780766578
(Upper 4 digits)
+1
93
2
8
(Lower 4 digits)
S1 S2
D D
000680766
5
78
4022
+1(Remainder)(Quotient)
S1 S2
D D
Digits exceeding the designated number of digits are
assumed to be 0.
/