Network Diagnostics From Gx Developer (Online Tests) - Mitsubishi Electric Melsec QJ71LP21 Reference Manual

4 SETUP AND PROCEDURES BEFORE STARTING THE OPERATION

4.8 Network Diagnostics from GX Developer (Online Tests)

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With the network diagnostic function of GX Developer, the line status can easily be
checked and diagnosed.
To conduct the network diagnostics, the network parameters (station number setting
switch, mode setting switch, number of modules, network settings, and common
parameters) must be set.
However, even if not all the parameters were set, the loop test can be performed while
the T.PASS LED is on.
The network diagnostics function allows the diagnostics of the network module while
maintaining it in the online status when a problem occurs during system operation.
The following table lists the tests that can be conducted for each network system:
Test item
Network test
Loop test
Setup confirmation test
Station order check test
Communication test
1: The setup confirmation test cannot be executed in the twist bus system.
For details of the operations of each function, refer to the GX Developer Operating
Manual.
The following screen is displayed when the network diagnostics is selected with GX
Developer. Click the button for the network diagnostic item to be conducted.
Optical loop Coaxial/twisted
system bus system
1
MELSEC-Q
Data link status of cyclic
and transient
transmissions
Continue
Pause Section 4.8.1
Pause Section 4.8.2
Pause Section 4.8.3
Continue Section 4.8.4
: Executable : Not executable
Reference
section
Section 7.8
Select a test.
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