Fnc203 - Len / Character String Length Detection - Mitsubishi Electric FX3G SERIES Programming Manual

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
26.4 FNC203 – LEN / Character String Length Detection
Outline
This instruction detects the number of characters (bytes) of a specified character string.
1. Instruction format
FNC 203
LEN
2. Set data
Operand Type
S
D
3. Applicable devices
Bit Devices
Oper-
and System User
Type
X Y M T C S D .b KnX KnY KnM KnS
S
D
Explanation of function and operation
1. 16-bit operation (LEN and LENP)
The length of a character string stored in
until the first device storing "00H" is handled as a character string in units of byte.
Command
input
FNC203
LEN
b15----------b8
S 2nd character 1st character
4th character 3rd character
S +1
S +2 6th character 5th character
00H
S +n
For example, when "ABCDEFGHI" is stored in
b15----------b8
S 42H(B)
S +1 44H(D)
46H(F)
S +2
S +3 48H(H)
S +4 00H
626
Mnemonic
16-bit Instruction
P
LEN
5 steps
LENP
Head device number storing a character string whose length is to be detected
Device number storing the detected character string length (number of bytes)
Digit Specification
S
D
b7-------------b0
"n"th character
It indicates the end of character string.
b7-------------b0
41H(A)
43H(C)
"ABCDEFGHI"
45H(E)
47H(G)
49H(I)
26 Character String Control – FNC200 to FNC209
26.4 FNC203 – LEN / Character String Length Detection
→ For handling of character strings, refer to Section 5.3.
Operation Condition
Continuous
Operation
Pulse (Single)
Operation
Description
Word Devices
Special
System User
Unit
T C D R U \G
and later is detected, and stored to
S
b15---------------b0
Character string
D
S and later as shown below, K9 is stored to
b15---------------b0
D
Mnemonic
32-bit Instruction
⎯
⎯
Con- Real
Index
stant Number
V Z Modify K H E
. Data starting from
D
length
9
Operation Condition
Data Type
Character string
16-bit binary
Others
Charac-
Pointer
ter String
" " P
S
D .