Specifications

23
2. Replacement of FX2N series
1
Introduction
2
Replacement of FX2N series
3
Replacement of FX2NC
series
4
Program changeover method
A
Models affected by production termination
B
Related manuals
C
Frequently asked questions
Device FX2N series FX3U series
Division Use Number
No. of
points
Number
No. of
points
D
Data
register
General use
(16-bit) [variable]
D0 to D199
200
points
D0 to D199
200
points
Latched
(16-bit) [variable]
D200 to D511
312
points
D200 to D511
312
points
Latched
(16-bit) [xed]
D512 to D7999
7488
points
D512 to D7999
7488
points
Special (16-bit) D8000 to D8255
256
points
D8000 to D8511
512
points
Index (16-bit)
V0 to V7,
Z0 to Z7
16
points
V0 to V7,
Z0 to Z7
16
points
Extension register
(16-bit)
- - R0 to R32767
32768
points
Extension le register
16-bit
- -
ER0 to ER32767
(when memory
cassette is installed)
32768
points
P
Pointer
For JUMP, CALL branch P0 to P127
128
points
P0 to P4095
4096
points
Input interrupt I00 to I50 6 points I00 to I50
6 points
in total
Input delay interrupt - - I00 to I50
Timer interrupt I6 to I8 3 points I6 to I8 3 points
Counter interrupt I010 to I060 6 points I010 to I060 6 points
2.5 Replacement of PLCs
The following includes main points of caution when replacing main units and expansion equipment.
For more details on each item, please refer to the reference page of this manual, and the hardware and
programming manuals of the PLCs and related documents.
Applicable
equipment
Item Measures and cautions
Reference
page
Main unit
Change of mounting width
dimension when mounting
with screws
Screw mounting positions in the lateral
direction are different. Modications may be
required for hardware installation.
Section 2.3
Additional wiring for input
terminal block
Add wiring to the S/S terminal of the FX
3U
series.
Input and output wiring
change
Wiring change required for terminal block
connections.
RS-485
communication
expansion
equipment
Checking cable size for
wiring of FX
2N-485-BD or
FX2N-485ADP
Make sure FX3U RS-485 communication
equipment conforms to the corresponding wire
size. If it does not conform, change the wire size.
Handling of terminal end
resistance of FX2N-485-BD
or FX2N-485ADP
FX3U RS-485 communication equipment
incorporates terminal end resistance. Select the
resistance value by using the built-in selection
switch.
Other expansion
equipment
Wiring to each unit and block
Re-wiring is needed for terminal block type
equipment.
Operation
conrmation
Operation and test of
sequence program
Operate the replacement sequence program
and hardware equipment, check and adjust the
equipment function and operation timing.
Note the difference in function mentioned
in the reference page, and make sure the
equipment operates in conformity with the
designed specication.
Section 2.4