Checking communication state of C
Controller module (MELSEC iQ-R Series)
(1) When using the Command Prompt of Windows
Execute a Ping command at the Command Prompt of
(a) When normal communication
Reply from 192.168.3.3: bytes=32 time
(b) When abnormal communication
Request timed out.
(2) When abnormal communication
At abnormal communication, check the following and
execute the Ping command again.
• Cable connecting condition
• Confirmation of switch and network parameter setting
• Operation state of PLC CPU (faulty or not)
• The IP address of C Controller module (MELSEC iQ-
R Series) specified in the ping command
Ethernet diagnostics of CW Configurator
Ethernet diagnostics of CW Configurator is available to
a Ping test from the PLC.
For details of Ethernet diagnostics of CW Configurator,
refer to the following manual.
Manuals of C Controller module (MELSEC iQ-R
23 - 26
23. ETHERNET CONNECTION
23.4 PLC Side Setting
23.4.5 Connecting to Built-in Ethernet
This section describes the settings of the GOT and Built-in
Ethernet port CPU in the following case of system
Connecting to Built-in Ethernet port CPU
For details of Built-in Ethernet port CPU, refer to the
QnUCPU User's Manual (Communication via
Built-in Ethernet Port)
MELSEC-L CPU Module User's Manual(Built-In
For connecting one Built-in Ethernet port QCPU to one
GOT, the PLC side settings are not required. Set
[Ethernet] for [Controller Setting] on GT Designer3, and
then connect Built-in Ethernet port QCPU to the GOT.
For the settings when using system devices including a hub
and a transceiver, refer to the following.
These setting items do not exist on the PLC side. However,
the virtual values must be set on the GOT side.
port CPU (one-to-one
[Controller Setting] and [Ethernet] of GT Designer3
(The settings other than the
following are set to the default)
<Connecting to Built-in Ethernet port CPU>
(The following settings are set to the default)
: 1 (virtual)
: 2 (virtual)
: 5006 (fixed)
: UDP (fixed)
23.4.6 Connecting to Built-in Ethernet port CPU
[Controller Setting] and [Ethernet] of GT
: UDP (fixed)