Delta AH500 Programming Manual page 645

API Instruction code
2112 $LEFT
Device X Y M
 
S
 
n
 
D
Symbol:
Explanation:
1. The instruction is used to retrieve n characters in the string in S from the left, and the
characters which are retrieved are stored in D.
2. If n is 0, the value in D is 0.
b15 b8
Second ASCII code
S
F our th ASCII code
S +1
n-1 t h A SCII code from the last
n+1 AS CII c ode from the last
t h
16#00
If the data in S is ABCDEF12345 and n is 7, seven characters in the string in S are retrieved
from the left. The conversion result is as follows.
b15
S
S +1
ABCDEF 12345
S +2
S +3
S
+4
S +5
Example:
When M0 is ON, the instruction $LEFT is executed. The six characters starting from the character in
D100 are retrieved, and stored in D10~D12.
Operand
P S, n, D
S T C HC D
  
  
  
Pulse instruction
AH500
S ： String
Number of characters which are
n ：
retrieved
Device in which the characters
D ：
retrieved are stored
b7
b0
F irst ASCII code
T hi rd A SCII c ode
n-2 A SCII code from the last
t h
n ASCII c ode from the l as t
t h
Last A SCII c ode
b8 b7
16#42(B) 16#41( A)
16# 44(D) 16# 43(C)
16# 46(F )
16# 45(E)
16# 32(2)
16# 31(1)
16# 34(4) 16# 33(3)
16# 00 16# 35(5)
Ch a pt er 6 Ap p l i ed I ns t r uc t i ons
The retrieve of the characters in the
string begins from the left.
L SM SR E PR
  
   
 
16-bit instruction (7-13 steps)
AH500
b15 b8 b7 b0
Second ASCII code
F our th ASCII code
n-1 A SCII code from the last
t h
n-2
16#00
b0 b15
16# 42(B)
16# 44(D)
16# 46(F )
16# 00
Seventh c haracter
Function
K 16# "$" DF

 
32-bit instruction
-
Word
Word
Word
F irst ASCII code
D
T hi rd A SCII c ode
D
+1
t h A SCII code from the last
n t h ASCII c ode from the l as t
b8 b7 b0
16#41( A) D
+1
16# 43(C) D
+2
16# 45(E) D
+3
D
16# 31(1)
6 - 4 7 7