Programming instructions

21
Ethernet Interface Modules – FX2NC-ENET-ADP & FX3U-ENET
Ethernet is the industry standard for computer-to-computer networking. Ethernet
is beginning to make its way to factory floor devices.
The FX2NC-ENET-ADP can be connected to the FX1S, FX1N, FX2N, and
FX2NC PLCs. All but the FX2NC will require the addition of the FX1N-CNV-BD
or FX2N-CNV-BD. This is a simple serial to Ethernet gateway. GX-Developer
v8.25 and later have support for the Ethernet connection to the FX Series PLCs
via this module. Prior versions of the software required a software package
called Serial-IP to simulate a COM port connection for an IP address.
The FX3U-ENET works with the FX3U series PLCs. It is a full-featured Ethernet
module. The FX3U supports up to 8 active connections to the PLC. You can
program the PLC via GX-Developer or retrieve data via MX-OPC Server. This
module supports the sending and receiving of email messages. FX3U PLCs can
communicate with other FX3U PLCs over Ethernet.
2.10 Miscellaneous Hardware
Display Module – FX3U-7DM
The FX3U-7DM Display Module connects to the FX3U and gives the operator a 4
line by 16 character text display screen. This unit mounts directly to the front of
the PLC. It allows the operator to view the PLC clock, view or modify data
addresses inside the PLC, perform error checks, show PLC status, as well as
display user-defined text messages. The module can be protected with a
password. A panel-mounting adapter is sold separately which will allow the unit
to be mounted through the door of and enclosure.
This module is covered in more detail in Section 19 of the FX3U Series Manual –
Hardware Edition, part number JY997D16501.
2.11 Power Supplies
All PLCs in the FX family have an integrated power supply. The power supply
accepts either 85 ~ 264 VAC or 24VDC (12 VDC on select FX1S models).
The FX power supply generates 2 types of bus power: 5VDC and 24VDC. The
amount of current on each supply varies depending on model and size of the
PLC. Check the hardware manual for the product you will be working with.
The 5 VDC runs on a bus that provides power to the CPU and extension blocks.
Because there is a finite amount of power generated, this limits the number of
extension blocks that can be connected.
The 24VDC current also runs to the 0V and 24V terminals on the PLC. This
power can be used for discrete I/O extensions, and is also available for the
powering of accessories such as sensors and HMIs. Be careful not to exceed
the rated capacity of the power supply.