Mitsubishi Electric Q12DCCPU-V - Page 263

6
PREPARATORY PROCEDURES AND SETTING
6.6 Network Settings for 1:1 Connection
6 - 45
1
OVERVIEW
2
SYSTEM CONFIGURATION
3
SPECIFICATIONS
4
FUNCTIONS
5
ACCESS VIA NETWORK MODULES
6
PREPARATORY PROCEDURES AND SETTING
7
I/O NUMBER ASSIGNMENT
8
MEMORIES AND FILES
(6) Precautions
(a) Precautions for using two Ethernet channels (ports) (Q12DCCPU-V only)
When using two channels as Ethernet ports, two different network addresses
must be set for CH1 and CH2 of the C Controller module.
In the above case, a response to the message received through each channel is
sent as follows.
• Messages (including response packets such as ping) to the device having the
same network address as CH1 are sent from CH1.
• Messages (including response packets such as ping) to the device having the
same network address as CH2 are sent from CH2.
<Example where communications are not available>
Normal communications are not available with a personal computer of a different
network address through an Ethernet port if the configuration is as shown below.
* 1 A personal computer with the same network address is not connected to the Ethernet port.
* 2 A personal computer connected to the Ethernet port has a different network address.
Figure 6.40 Example of ping execution from a personal computer (communication via CH1)
Figure 6.41 Example of ping execution from a personal computer (communication not available)
Personal computer
C Controller module, CH2
Ethernet
[192.168.3.10]
[192.168.4.3]
C Controller module, CH1
IP address
[192.168.3.3]
Subnet mask
[255.255.255.0]
ping request and
ping response
IP address
Subnet mask
[255.255.255.0]
IP address
Subnet mask
[255.255.255.0]
Personal computer
C Controller module, CH2
Ethernet
[192.168.3.10]
[192.168.4.3]
C Controller module, CH1
IP address
[192.168.3.3]
Subnet mask
[255.255.255.0]
1) ping request
2) A ping response
cannot be sent.
*1
*2
IP address
Subnet mask
[255.255.255.0]
IP address
Subnet mask
[255.255.255.0]