Checking The Ip Address; Precautions - Mitsubishi Electric Q03UDVCPU User Manual

11.3

Checking the IP Address

(1) Checking using the Ethernet diagnostics
The IP address of the built-in Ethernet port can be checked with the Ethernet diagnostics. For details of the
Ethernet diagnostics, refer to the following.
GX Works2 Version 1 Operating Manual (Common)
(2) Confirmation using the special register
The IP address of the built-in Ethernet port can be checked with the special register.
• IP address: SD1260, SD1261
• Subnet mask pattern: SD1262, SD1263
• Default router IP address: SD1264, SD1265
*1 Stored as follows.
Example When IP address is 192.168.3.39 (C0A80327
11.4

Precautions

The following describes precautions for the IP address change function.
(1) Power-off and reset operations
Do not power off and reset the CPU module while writing to or clearing the IP address storage area (flash ROM).
Values may not be reflected to the IP address storage area (flash ROM). Check that SM1293 (IP address storage
area write complete) and SM1296 (IP address storage area clear complete) are started before powering off and
resetting the CPU module.
(2) IP address of parameters
For IP address of the built-in Ethernet port, values in the IP address storage area (flash ROM) take priority over
values of parameters. To use the IP address specified by parameters, clear the value in the IP address storage
area (flash ROM).
(3) Duplicated IP addresses
When changing an IP address, check that the changed IP address is not the same as that of other devices. If IP
addresses are duplicated, communication may be performed with a wrong device. The duplicated status can be
checked by either of the following methods.
• By using the Find CPU function
• By disconnecting an external device from the network and performing a PING test to the IP address of the
disconnected external device (The IP address is duplicated if a response message is returned.)
178
Store the lower 2 bytes of the
IP address
SD1260 0327
H
SD1261 C0A8
H
Store the upper 2 bytes of the
IP address
)
H
*1