Delta AH500 Programming Manual page 625

API Instruction code
2106 $LEN
Device X Y M
 
S
 
D
Symbol:
Explanation:
1. The length of the string in S is calculated, exclusive of 16#00 with which the string ends. The
length of the string is stored in D.
2. The value stored in D should be within the range between 0 and 65535.
If the number of characters contained in the string is 65536, which is equal to 16#10000, the
value in D is 0.
If the number of characters contained in the string is 65537, which is equal to 16#10001, the
value in D is 0.
b15
Second c haracter
S
F our th character
S+1
Six th character
S+2
16#00
( End ind c harac te r
S+n
If the data in S~S+4 is ABCDEFGHI, the calculation result is as follows.
b15
S 16#42( B)
16#44( D)
S+1
16#46( F)
S+2
16#48( H)
S+3
16#00
S+4
( En di ng cha ra cter
Example 1:
Suppose S is the string "DELTA". When the PLC runs, the value in D0 is 5.
Operand
P S, D
S T C HC D
  
  
Pulse instruction 16-bit instruction (5-11 steps) 32-bit instruction
AH500
S ： String
D ： Length of the string
b8 b7 b0
F irst character
T hi rd c har acter
F ifth character
n charac ter
t h
)
b8 b7 b0
16#41( A)
16#43( C)
ABCDEF GHI
16#45( E)
16#47( G)
16#49( I)
)
Ch a pt er 6 Ap p l i ed I ns t r uc t i ons
Calculating the length of the string
L SM SR E PR
  
   
AH500
Word/Double word
Word/Double word
b15
n
Length of the string
b15
9
Function
K 16# "$" DF

-
b0
D
b0
D
6 - 4 5 7