Delta AS Series Programming Manual page 1054

AS Ser ies Pro gra mm in g M anu al
API Instruction code
2112
Device X

S

n
D
Data
type
S
n
D
Symbol
_6
Explanation
1. This instruction retrieves n characters from the string in S starting from the left, and stores the retrieved characters
in D. When S is a string device, the maximum length for the value in S is 31 characters; when the S is not a string
device, the maximum length for the value in S is 255 characters.
2. If n is 0, the value in D is 0.
b15
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
If the data in S is ABCDEF12345 and n is 7, the instruction retrieves seven characters in the string in S from the
left. The conversion result is as follows.
6 - 7 7 4
$LEFT P
Y M S T C
  
  
  



b8 b7
F irst ASCII code
T hi rd A SCII c ode
n-2 A SCII code from the last
t h
n ASCII c ode from the l as t
t h
Last A SCII c ode
16#00
Operand
S, n, D
HC D FR SM
 
 




Pulse instruction
AS
S ： String
n ： Number of characters to retrieve
D ： Device where the characters retrieved are stored
b0 b15 b8
Second ASCII code
F our th ASCII code
n-1 A SCII code from the last
t h
16#00
Function
Retrieving characters from a string
beginning from the left.
SR E K 16#
   
16-bit instruction 32-bit instruction
AS
b7 b0
F irst ASCII code
T hi rd A SCII c ode
n-2 t h A SCII code from the last
n t h ASCII c ode from the l as t
"$" F


-
D
D
+1