Mitsubishi Electric MELSEC FX3U - FNC 08 - for; Start a FOR;NEXT Loop

249
FX3G/FX3U/FX3UC Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
8 Program Flow – FNC 00 to FNC 09
8.9 FNC 08 – FOR / Start a FOR/NEXT Loop
1
Introduction
2
Overview
3
Instruction List
4
Devices in Detail
5
Specified the Device & Constant
6
Before Programming
7
Basic Instruction
8
FNC00-FNC09 Program Flow
9
FNC10-FNC19 Move & Compare
10
FNC20-FNC29 Arith. & Logic Operation
8.9 FNC 08 – FOR / Start a FOR/NEXT Loop
Outline
FOR instruction specifies the number of repetition of the loop between FOR and NEXT (FNC 09) instructions.
1. Instruction format
2. Set data
3. Applicable devices
S: This function is supported only in FX3U/FX3UC PLCs.
Explanation of function and operation
→ For details, refer to NEXT (FNC 09) instruction.
Related instruction
FOR instruction and NEXT (FNC 09) instruction are set as a pair in programming.
Operand type Description Data type
Number of repetition of the loop between FOR and NEXT instructions
[ = K1 to K32767]
(A value from −32768 to 0 is handled as "1".)
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 S 33333
−
FNC 08
FOR
FOR
Mnemonic Operation Condition Mnemonic Operation Condition
Continuous
Operation
16-bit Instruction
3 steps
32-bit Instruction
S S
S