User guide

Chapter 20
Math Instructions
20–9
DDV
DOUBLE DIVIDE
Source N7:0
9
Dest N7:1
5000
Double Divide DDV Output Instruction
(DDV)
F1 F2 F3 F4 F5
ZOOM on DDV –(DDV)– 2.3.0.0.2
NAME: DOUBLE DIVIDE
SOURCE: N7:0 9
DEST: N7:1 5000
EDT_DAT
HHT Ladder Display:
HHT Zoom Display:
Ladder Diagrams and APS Displays:
(online monitor mode)
The contents of the math register are divided by the source value. The
rounded quotient is placed in the destination. If the remainder is 0.5 or
greater, round up occurs in the destination. The unrounded quotient is placed
in the most significant word of the math register. The remainder is placed in
the least significant word of the math register.
Using Arithmetic Status Bits
C always reset
V set if division by zero or if the result is greater than 32,767 or less than
–32,768; otherwise reset. On overflow, the minor error flag is also set.
The value 32,767 is placed in the destination.
Z set if the result is zero; otherwise reset
S set if the result is negative; otherwise reset; undefined if overflow is set
Math Register
Initially contains the dividend of the DDV operation. Upon instruction
execution the unrounded quotient is placed in the most significant word of
the math register. The remainder is placed in the least significant word of the
math register.
Double Divide (DDV)