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490
FX
3G
/FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
16 External FX Device – FNC 80 to FNC 89
16.7 FNC 86 - VRSC / Volume Scale
16.7
FNC 86 - VRSC / Volume Scale
Outline
This instruction reads the value of a variable analog potentiometer on the variable analog potentiometer
board (FX
3G
-8AV-BD) attached to the FX
3G
PLC main unit as a numeric value in the range from 0 to 10.
1. Instruction format
2. Set data
3. Applicable devices
Explanation of function and operation
This instruction reads the value of a variable analog potentiometer on the variable analog potentiometer
board attached to the main unit as a numeric value in the range from 0 to 10.
However, the actual scale value does not always correspond to the switching position of the variable analog
potentiometer scale (0 to 10).
This instruction converts into a binary value the scale value of a variable analog potentiometer specified
in
, and transfers the converted binary value to
.
Operand type
Description
Data type
Volume number [setting range: 0 to 7]
16-bit binary
Device to which the read analog value is transferred
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
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
3 3
3
3 3
3
3
3
3 3 3 3
3 3
3
−
−
Mnemonic
Operation Condition
16-bit Instruction
5 steps VRSC
VRSCP
Mnemonic
Operation Condition
Continuous
Operation
Pulse (Single)
Operation
32-bit Instruction
P
FNC 86
VRSC
VOLUME SCALE
S
1
S
D
S
1
S
S
2
D
S
1
S
D
FNC 86
VRSC
Command
input
S
D