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FX
3G
/FX
3U
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3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
4 Devices in Detail
4.9 Data Register and File Register [D]
4.9.2
Structures of data registers and file registers
1) 16-bit type
One (16-bit) data register or file register can store a numeric value within the range from -32768 to +32767.
A numeric value can be read from or written to a data register by an applied instruction usually.
Or a numeric value can be directly read from or written to a data register from a display unit, display module, or
programming tool.
Or a numeric value can be directly read from or written to a data register from a display unit, display module, or
programming tool.
2) 32-bit type
Two serial data registers or file registers can express 32-bit data.
- A data register with a larger device number handles high-order bits, and a data register with a smaller device
- A data register with a larger device number handles high-order bits, and a data register with a smaller device
number handles low-order bits.
- In the index type, V handles high-order bits, and Z handles low-order bits.
Two data registers or file registers can store a numeric value within the range from -2,147,483,648 to
+2,147,483,647.
Two data registers or file registers can store a numeric value within the range from -2,147,483,648 to
+2,147,483,647.
In the case of 32-bit type, when a data register or file register on the low-order side (example: D0) is specified, the
subsequent number on the high-order side (example: D1) is automatically occupied.
Either an odd or even device number can be specified for the low-order side, but it is recommended to specify an
even device number for the low-order side under consideration of the monitoring function of display units, display
modules, and programming tools.
subsequent number on the high-order side (example: D1) is automatically occupied.
Either an odd or even device number can be specified for the low-order side, but it is recommended to specify an
even device number for the low-order side under consideration of the monitoring function of display units, display
modules, and programming tools.
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
2
4
8
16
32
64
128
256
512
1024
2048
4096
8192
16384
b15
Sign
0: Positive
0: Positive
number
1: Negative
number
b0
High
order
Low
order
D 0 (16 bits)
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
1
2
4
8
16
32
64
128
256
512
1
024
2
048
4
096
8
192
163
84
b31
Sign
0: Positive
0: Positive
number
1: Negative
number
b0
High
order
Low
order
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
327
68
655
36
131,
072
262,
144
524,
288
1,048,
576
2,097,
152
4,194,
304
8,388,
608
16,777
,216
33,554
,432
67,108
,864
134,217
,728
268,435
,456
536,870
,912
1,073,741
,824
D1 (high-order 16 bits)
D0 (low-order 16 bits)