File Registers - Mitsubishi MELSEC System Q Manual

Devices in Detail
5.5.3

File registers

The contents of file registers are also not lost when the power supply is switched off. File regis-
ters can thus be used for storing values that you need to transfer to data registers when the
PLC is switched on, so that they can be used by the program for calculations, comparisons or
as setpoints for timers.
File registers have the same structure as data registers.
Device
Device identifier
Device type (for setting and polling)
Possible device values
Device address format
Number of devices and
addresses
MELSEC System Q Beginners Manual
File registers
R
Word device (two registers can be combined to store double-word
values)
16 bit register: 0000
32 bit register: 00000000
2 147 483 647)
Decimal
Q00J 0
Q00
32767 (R0 to R32766)
Q01
Q02
Q02H
Q06H
32767 in each block (R0 to R32766)
Q12H When a memory card is used, up to 1 million additional file registers
can be stored.
Q25H
Q12PH
Q25PH
to FFFF (-32768 to 32767)
H H
to FFFFFFFF (-2 147 483 648 to
H H
Registers
5 – 13