Delta Electronics AH500, Руководство пользователя

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A H 5 0 0 M o t i o n C o n t r o l M o d u l e M a n u a l
API Instruction code Operand Function
29 D NEG P D
Taking the two’s
complement of a number
Device X Y M S K 16# F KnM KnS D W T C V Z
D
       
Pulse instruction 16-bit instruction (3 steps) 32-bit instruction (3 steps)
  
E xp la nat io n

The instructions can be used to convert a negative binary value into an
absolute value.

D : Device in which the two’s complement of the value in the device is
stored

Generally, the pulse instructions NEGP and DNEGP are used.
E xamp le 1

When X0.0 is turned from OFF to ON, all the bits in D0 are inverted (0
becomes 1, and 1 becomes 0), 1 is added to the result, and the final
value is stored in the original register D10.
X0.0
N EG P D 10
E xamp le 2

Getting the aboluste value of a negative number
1. When bit 15 in D0 is 1, M0 is ON. (The value in D0 is a negative
value.)
2. When M0 is ON, the instruction NEG is used to take the two’s
complement of the negative value in D0. (The corresponding
positive value is gotten.)
M1000
BON D0 M 0 K1 5
NEGP D0
M 0
E xamp le 3

Getting the absolute value of the difference between two values
Suppose X0.0 is ON.
1. When the value in D0 is greater than that in D2, M0 is ON.
2. When the value in D0 is equal to that in D2, M1 is ON.
3. When the value in D0 is less than that in D2, M2 is ON.
4. The value in D4 is a positive value.
X0.0
C MP D 0 D 2 M0
M0
S UB D 0 D 2 D 4
M2
S UB D 2 D 0 D 4
M1
5 - 4 6