Mitsubishi Electric MELSEC FX3U - 26.5 FNC204 - RIGHT; Extracting Character String Data from the Right

655
FX3G/FX3U/FX3UC Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
26 Character String Control – FNC200 to FNC209
26.4 FNC203 – LEN / Character String Length Detection
21
FNC160-FNC169 Real Time Clock Control
22
FNC170-FNC179 External Device
23
FNC180 Alternate Instructions
24
FNC181-FNC189 Others
25
FNC190-FNC199 Block Data Operation
26
FNC200-FNC209 Character String Control
27
FNC210-FNC219 Data Operation 3
28
FNC220-FNC249 Data Comparison
29
FNC250-FNC269 Data Table Operation
30
FNC270-FNC274 Ex-Device Inverter Comms
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
Real
Number
Charac-
ter String
Pointer
XYMTCSD
 .b KnX KnY KnM KnS T C D R U\G VZModifyKH E "  "P
33333333 3 3
3 3 3 3333 3 3
P
FNC 203
LEN
Mnemonic Operation Condition
16-bit Instruction
5 steps
LEN
LENP
Mnemonic Operation Condition
Continuous
Operation
Pulse (Single)
Operation
32-bit Instruction
⎯
⎯
S
D
S
D
S D
S
FNC203
LEN
b15----------b8
+1
+2
2nd character 1st character
4th character 3rd character
00H
b15---------------b0
Character string
length
D 
S 
S 
S 
+nS 
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
42H(B) 41H(A)
44H(D) 43H(C)
48H(H)
b15---------------b0
9
D 
S 
S 
S 
+4S 
46H(F) 45H(E)
47H(G)
“ABCDEFGHI”
00H 49H(I)
+3S 
b7-------------b0