Mitsubishi Electric MELSEC FX Series - 7.9.7 VRSC

7 Applied Instructions
7.9 External Device (optional device)
421
FXCPU Structured Programming Manual
(Basic & Applied Instruction)
1
Outline
2
Instruction List
3
Configuration of Instruction
4
How to Read Explanation of Instructions
5
Basic Instruction
6
Step Ladder Instructions
7
Applied Instructions
8
Interrupt Function and Pulse Catch Function
A
Relationships between devices and addresses
7.9.7 VRSC
Outline
This instruction reads out the value determined in the variable resistor graduations.
1. Format and operation, execution form
2. Set data
3. Applicable devices
S: Refer to "Cautions".
Function and operation explanation
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 .
Cautions
1) FX1NC, FX2NC PLCs are not provided with variable resistors for reading out by this instruction, and hence
do not function even if programmed.
2) FX
3G PLC supports the instruction at V1.10 or later.
3) Object devices are limited
S1: FX
3G PLCs only are applicable.
FX3U(C) FX3G FX2N(C) FX1N(C) FX1S FXU/FX2C FX0N FX0(S)
Instruction
name
Operation
Execution
form
Expression in each language
Structured ladder ST
VRRD 16 bits Continuous VRSC(EN, s, d);
VRRDP 16 bits Pulse VRSCP(EN, s, d);
Variable Description Data type
Input
variable
EN Execution condition Bit
Variable resistor number for reading out the graduations ANY16
Output
variable
ENO Execution state Bit
Storage destination of variable resistor graduations ANY16
Operand
type
Bit Devices Word Devices Others
System User Digit designation System User
Special
Unit
Index
Cons
tant
Real
Number
Character
String
Pointer
XYMTCS
D.b
KnX KnY KnM KnS T C D R
U\G
VZModifierK H E
""
P
S1 S1
zzz
zz z z z z zz z
S1
zz z
VRSC
EN
s
ENO
d
VRSCP
EN
s
ENO
d
X000
VRSC
EN ENO
d
D1sK1