7 Applied Instructions
7.6 High Speed Processing
268
FXCPU Structured Programming Manual
(Basic & Applied Instruction)
7.6.2 REFF
Outline
The digital input filter time of the inputs can be changed using this instruction or D8020.
Using this instruction, the status of inputs can be refreshed at an arbitrary step in the program for the
specified input filter time, and then transferred to the image memory.
1. Format and operation, execution form
2. Set data
3. Applicable devices
S: Refer to "Cautions".
Function and operation explanation
1. 16-bit operation(REFF, REFFP)
The image inputs below are refreshed at the digital input filter time [n × 1 ms].
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
REF 16 bits Continuous REF(EN, n);
REFP 16 bits Pulse REFP(EN, n);
Variable Description Data type
Input variable
EN Execution condition Bit
Digital input filter time (1 ms increment) ANY16
Output variable ENO Execution state Bit
Operand
type
Bit Devices Word Devices Others
System User Digit Specification
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
VZModifier K H E
"
"
P
z
S1 S2 S2
PLC Input
FX
3U, FX3UC
X000 to X017
X000 to X007 in the FX3U-16M, and FX3UC-16M
FX2N, FX2NC
X000 to X017
X000 to X007 in the 16-input basic units
FXU, FX2C X000 to X007
REFF
EN ENO
n
REFFP
EN
n
ENO
REFF
EN ENO
n
Command input
K0 to K60 (Filter constant from 0 to 60 ms)
Digital input
filter time
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