Specifications

54
Appendix C. Frequently asked questions
Appendix C. Frequently asked questions
 PLC
Question Answer
Is there a difference in memory capacity for
the FX3U(C)?
The FX2N(C) has 8K steps, or 16K steps when expanded with
FX-EEPROM-16.
FX3U(C) has 64K steps.
Is there a difference in communication speed
of the built-in programming port?
FX
2N(C) operates at 19.2 kbps (9.6kbps prior to Ver. 3.00).
FX3U(C) operates at 115.2 kbps.
Is the wiring of FX
2N directly usable in FX3U?
Yes, except for DC power type FX3U, in which the S/S
terminal cannot be connected to the (0V) and (24V) terminals.
Are the connectors of the FX
2NC detachable
and usable in the FX3UC as replacements?
Yes.
The wiring is also usable.
Can FX
2N expansion boards be used by the
FX3U?
No.
FX3U expansion boards must be used.
Can FX
2NC expansion boards be used by the
FX3UC?
No.
The clock function and the inverter operation function are built
into the FX3UC.
Can FX2N memory cassettes be used by the
FX3U?
No.
A FX3U memory cassette must be used.
Can FX2NC memory boards be used by the
FX3UC?
No.
A FX3U memory cassette must be used.
 System
Question Answer
Can FX0N I/O extension blocks or special
function blocks be used by the FX3U(C)?
No.
Use I/O extension blocks or special function blocks
compatible with the FX3U(C).
Can FX
2N I/O extension units, I/O extension
blocks, and special function blocks be used by
the FX3U(C)?
Yes.
Can FX
2 special function blocks which
were connected to the FX2N with the FX2N-
CNV-IF be used by the FX3U in the same
conguration?
No.
Use special function blocks compatible with the FX3U.
The FX
2N-CNV-BC and FX0N-65EC are being
used in the current system. Can they be used
by the FX3 series?
Yes.
One extension cable can be connected to the system.
A FX2NC special adapter is being used for
communications with the FX2N (C) . Can it be
used by the FX3 series?
No.
Use a communication special adapter compatible with the
FX3U.
 Tool
Question Answer
Can the FX-20P be used with the FX
3U(C)?
Yes.
However, it is limited to the devices and command range of the FX2N.
Can FX-PCS/WIN be used with the FX3U(C)?
Yes.
However, it is limited to the devices and command range of the FX2N.
Which versions of GX Developer support the
FX3U(C)?
The FX3U(C) is supported in GX Developer from Ver. 8.24A
and later.
Earlier versions of the software may be used by selecting
“FX2N(C)”, but it is limited to the device and functionality
range of the FX2N.