Mitsubishi Electric Melsec QJ71LP21 - Network Diagnostics from GX Developer (Online Tests)

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MELSEC-Q
4 SETUP AND PROCEDURES BEFORE STARTING THE OPERATION
4.8 Network Diagnostics from GX Developer (Online Tests)
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
Optical loop
system
Coaxial/twisted
bus system
Data link status of cyclic
and transient
transmissions
Reference
section
Network test Continue Section 7.8
Loop test
Pause Section 4.8.1
Setup confirmation test
1
Pause Section 4.8.2
Station order check test
Pause Section 4.8.3
Communication test Continue Section 4.8.4
: Executable : Not executable
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.
Select a test.