Ref (Fnc 50) - Mitsubishi FX1S Series Programming Manual

FX Series Programmable Controlers
5.6.1

REF (FNC 50)

Mnemonic
REF
FNC 50
(
Refresh)
16 BIT OPERATION
the REF instruction is used. The REF instruction can only be used to update or refresh blocks of
8 (n) consecutive devices. The head address of the refreshed devices should always have its
last digit as a 0 (zero), i.e. in units of 10.
Note: A short delay will occur before the I/O device is physically updated, in the case of inputs
a time equivalent to the filter setting, while outputs will delay for their set energized time.
Function
Forces an X, Y
)
immediate update
of inputs or
Note:
outputs as
D should always be a
specified
multiple of 10, i.e. 00,
10, 20, 30 etc.
32 BIT OPERATION
Operands
D
K, H
)
Note:
n should always be a
multiple of 8, i.e. 8, 16,
24, 32 etc.
PULSE-P
Operation:
Standard PLC operation processes output and input
status between the END instruction of one program
scan and step 0 of the following program scan. If an
immediate update of the I/O device status is required
Applied Instructions 5
FX FX FX
1S 1N 2N
Program steps
n
REF, REFP:
5 steps
5-68
FX
2NC