Mitsubishi MELSEC QCPU User Manual

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MELSEC-Q/QnA
6 BASIC INSTRUCTIONS
High Performance
QnA Q4AR
Basic
QCPU
PLC CPU
Process CPU
6.7 I/O Refresh Instructions
6.7.1 I/O Refresh (RFS, RFSP)
Usable Devices
Internal Devices
(System, User)
MELSECNET/10(H)
Direct J
\
Set
Data
Bit Word
File
Register
Bit Word
Special
Function
Module
U
\G
Index
Register
Zn
Constant
K, H
Other
S
(Only X, Y)
n
[Instruction Symbol] [Execution Condition]
Command
Command
RFSP
RFS
n
n
S
S
RFSP
RFS
[Set Data]
Set Data Meaning Data Type
S
Head device number of the device that will conduct refresh operation Bit
n
Number of points to be refreshed BIN 16 bits
[Functions]
(1) Refreshes only the device being scanned during a scan, and functions to fetch input from
external sources or to output data to an output module.
(2) Fetching of input from or sending output to an external source is conducted in batch only after
the execution of an END instruction, so it is not possible to output a pulse signal to an outside
source during the execution of a scan.
When a refresh operation is conducted, inputs (X) or outputs (Y) of the device numbers
relevant to the program being executed are forcibly refreshed, so it is possible to output a
pulse signal to an external source during a scan.
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Mitsubishi MELSEC QCPU Specifications

General

Brand	Mitsubishi
Model	MELSEC QCPU
Category	Controller
Language	English