Mitsubishi Electronics FX3G User Manual
624
FX
3S
/FX
3G
/FX
3GC
/FX
3U
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3UC
Series
Programming Manual - Basic & Applied Instruction Edition
26 Character String Control – FNC200 to FNC209
26.4 FNC203 – LEN / Character String Length Detection
26.4
FNC203 – LEN / Character String Length Detection
Outline
This instruction detects the number of characters (bytes) of a specified character string.
→ For handling of character strings, refer to Section 5.3.
1. Instruction format
2. Set data
3. Applicable devices
Explanation of function and operation
1. 16-bit operation (LEN and LENP)
The length of a character string stored in
and later is detected, and stored to
. Data starting from
until the first device storing "00H" is handled as a character string in units of byte.
For example, when “ABCDEFGHI” is stored in
and later as shown below, K9 is stored to
.
Operand Type
Description
Data Type
Head device number storing a character string whose length is to be detected
Character string
Device number storing the detected character string length (number of bytes)
16-bit binary
Oper-
and
Type
Bit Devices
Word Devices
Others
System User
Digit Specification
System User
Special
Unit
Index
Con-
stant
stant
Real
Number
Charac-
ter String
Pointer
X Y M T C S D .b KnX KnY KnM KnS T C D R U \G
V Z Modify K H
E
" "
P
P
FNC 203
LEN
Mnemonic
Operation Condition
16-bit Instruction
5 steps
LEN
LENP
LENP
Mnemonic
Operation Condition
Continuous
Operation
Pulse (Single)
Pulse (Single)
Operation
32-bit Instruction
⎯
⎯
⎯
S
D
S
D
S
D
S
FNC203
LEN
b15----------b8
+1
+2
+2
2nd character 1st character
4th character 3rd character
00H
b15---------------b0
Character string
length
D
S
S
S
S
+n
S
6th character 5th character
“n”th character
It indicates the end of character string.
Command
input
D
S
b7-------------b0
S
D
b15----------b8
+1
+2
+2
42H(B)
41H(A)
44H(D)
43H(C)
48H(H)
b15---------------b0
9
D
S
S
S
S
S
+4
S
46H(F)
45H(E)
47H(G)
“ABCDEFGHI”
00H
49H(I)
+3
S
b7-------------b0