Fnc 66 - Alt / Alternate State - Mitsubishi Electric MELSEC FX3U Programming Manual

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
14.7 FNC 66 – ALT / Alternate State
Outline
This instruction alternates a bit device (from ON to OFF or from OFF to ON) when the input turns ON.
1. Instruction format
FNC 66
ALT
2. Set data
Operand type
D
3. Applicable devices
Bit Devices
Oper-
and System User
Type
X Y M T C S D .b KnX KnY KnM KnS T C D R U \G
S
D
2
: "D .b" is available only in FX
Explanation of function and operation
1. 16-bit operation (ALT and ALTP)
Alternating output (1-step)
Every time the command input turns ON from OFF, a bit device specified in
OFF or from OFF to ON).
Command
input
Dividing output (by 2-step alternating output)
Multi-step dividing outputs are achieved by combination of two or more ALTP instructions.
Command
input
Specify a same device
M0
428
Mnemonic
16-bit Instruction
P
3 steps ALT
ALTP
Bit device number whose output is alternated
Digit Specification
and FX
3U
Command input
FNC 66
D
ALTP
D
1st step
Command
input
D
FNC 66
M0
M0
ALTP
2nd step
D
FNC 66
M1
M1
ALTP
Operation Condition
32-bit Instruction
Continuous
Operation
Pulse (Single)
Operation
Description
Word Devices
Special
System User
Unit
PLCs. However, index modifiers (V and Z) are not available.
3UC
ON
ON
ON ON
ON
D
D ON
14 Handy Instruction – FNC 60 to FNC 69
14.7 FNC 66 – ALT / Alternate State
Mnemonic Operation Condition
−
−
Others
Con- Real
Index
stant Number
V Z Modify K H E
is alternated (from ON to
D D
1
ON
ON ON
ON
Data type
Bit
Charac-
Pointer
ter String
" " P
ON
ON