Mitsubishi Electric MELSEC FX3U Programming Manual page 770

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
The table below shows the head device number in each sector:
Sector Head device
number
Sector 0 R0
Sector 1 R2048
Sector 2 R4096
Sector 3 R6144
Sector 4 R8192
Sector 5 R10240
Sector 6 R12288
Sector 7 R14336
Operation (when a memory cassette is used)
• Extension registers (R)
[inside the built-in RAM memory]
Device number
S
S +1
S +2
S +(2048×n)-1
Caution
1. Initialization of two or more sectors
When a memory cassette is attached, 18 ms is required to initialize one sector.
(When a memory cassette is not attached, only 1 ms or less is required to initialize one sector.)
When initializing two or more sectors, take either measures shown below.
• Set a large value to the watchdog timer D8000 using the following program
Initial pulse
M8002
768
Initialized device range
number
R0 to R2047,
ER0 to ER2047
R2048 to R4095,
ER2048 to ER4095
R4096 to R6143,
ER4096 to ER6143
R6144 to R8191,
ER6144 to ER8191
R8192 to R10239,
ER8192 to ER10239
R10240 to R12287,
ER10240 to ER12287
R12288 to R14335,
ER12288 to ER14335
R14336 to R16383,
ER14336 to ER16383
Current value
Before execution After execution
H0010
H0020
H0011
HABCD
FNC 12
K
MOV
33 Extension File Register Control – FNC290 to FNC299
Sector
number
Sector 8
Sector 9
Sector 10
Sector 11
Sector 12
Sector 13
Sector 14
Sector 15
• Extension file registers (ER)
[inside the memory cassette]
Device number
HFFFF
S
HFFFF
S +1
HFFFF
S +2
HFFFF
S +(2048×n)-1
D8000
33.3 FNC292 – INITR / Initialize R and ER
Head device
Initialized device range
number
R16384 to R18431,
R16384
ER16384 to ER18431
R18432 to R20479,
R18432
ER18432 to ER20479
R20480 to R22527,
R20480
ER20480 to ER22527
R22528 to R24575,
R22528
ER22528 to ER24575
R24576 to R26623,
R24576
ER24576 to ER26623
R26624 to R28671,
R26624
ER26624 to ER28671
R28672 to R30719,
R28672
ER28672 to ER30719
R30720 to R32767,
R30720
ER30720 to ER32767
Current value
Before execution After execution
H1234
H5678
H90AB
HCDEF
HFFFF
HFFFF
HFFFF
HFFFF