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User Manual
GFK-1503F
6.1.1
Autoconfiguration
If the PLC CPU has not had a configuration stored from the programmer, it automatically
creates its own configuration at powerup. To create the Autoconfiguration, the CPU reads
configuration data from each module and from the Ethernet interface. This includes an
Advanced User Parameter file for the Ethernet interface. When an Autoconfiguration is
present in the PLC CPU, it is possible to edit some of the Ethernet configuration parameters
from the Station Manager. This changes the parameters that are stored in the Ethernet
interface itself. If the PLC is power-cycled or cleared, the edited configuration will be
retrieved by the CPU from the Ethernet interface.
6.2
Configuring the Ethernet Interface
The CPU's fundamental Ethernet operating characteristics must be correctly configured for
proper operation over an Ethernet network. The default configuration cannot supply valid
network address data.
Parameters
Configuration
Mode
IP Address,
Subnet Mask, and
Gateway IP
Address
Ethernet Configuration
Description
This is fixed as TCP/IP. It cannot be changed.
The IP Address is the unique address of the Ethernet interface as a node on the
network. On a large network, a subnet mask can be used to identify a section
of the overall network. A gateway address can be used to identify a gateway
that joins one network with another.
These parameters must be correct, or the Ethernet interface may be unable to
communicate on the network and/or network operation may be disrupted. It
is especially important that each node on the network is assigned a unique IP
address.
These values should be assigned by the person in charge of your network (the
network administrator). TCP/IP network administrators are familiar with these
parameters. If you have no network administrator and are using a simple
isolated network with no gateways, you can use the following values as local IP
addresses:
10.0.0.2
First PLC
10.0.0.3
Second PLC
10.0.0.4
Third PLC
..
10.0.0.254 PLC Programmer or host
Also, in this case, set the subnet mask and Gateway IP address to 0.0.0.0.
See chapter 13 for more detailed information about IP Addressing and
gateways.
Note
: If this simple, isolated network is ever connected to another network, the IP
addresses 10.0.0.2 through 10.0.0.254 must not be used and the subnet
mask and Gateway IP address must be assigned by the network
administrator. The IP addresses must be assigned so that they are
compatible with the connected network.
Chapter 6
Jan 2020
61
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