Mitsubishi Electric MELSEC FX3U Programming Manual page 357

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
Explanation of function and operation
1. 16-bit operation (REF and REFP)
1) When refreshing outputs (Y)
"n" points are refreshed from the specified output device
Command
input
FNC 50
REF
- When this instruction is executed, the output latch memory is refreshed to the output status in the
specified range.
Image memory output (Y)
REF instruction (executed)
END instruction
processing (output)
Output refresh
REF instruction + END processing
Only END processing
2) When refreshing inputs (X)
"n" points are refreshed from the specified input device
Command
input
FNC 50
- If the input information is turned ON approximately 10 ms (response delay time of the input filter) before
the instruction is executed, the input image memory turns ON when the instruction is executed.
- In X000 to X017
*1 X000 to X007 in the FX
→ For details, refer to "13.1.1 What should be understood before using the REF instruction".
D n
Head
Number
device
of points
number
ON
D n
REF
Head
Number
device
of points
number
*1
, the response delay time of the input filter can be changed.
, FX -16M
3G 3U
13 High Speed Processing – FNC 50 to FNC 59
. ("n" must be a multiple of 8.)
D
K8 (H8) or K16 (H10): Up to K256 (H100) (which is a multiple of 8)
Y000, Y010 or Y020: Up to the final output number
(whose least significant digit number is "0")
ON ON
Improved response
delay time
. ("n" must be a multiple of 8.)
D
K8 (H8) or K16 (H10): Up to K256 (H100) (which is a multiple of 8)
X000, X010 or X020: Up to the final input number
(whose least significant digit number is "0")
and FX -16M .
3UC
13.1 FNC 50 – REF / Refresh
Improved response
delay time
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