Mitsubishi Electronics Q02HCPU ユーザーズマニュアル

 

 

 

11 - 12                                                                                                                                                       11 - 12 

MELSEC-Q

 

11   TROUBLESHOOTING 

 

11.2.13 Flowchart for when unable to read a program 

The following shows the flowchart to be followed when communication with 

GX Developer cannot be made during PLC power-on. 

 

The CPU cannot communicate
with the GX Developer.

Is the memory to be

read correct?

Select the correct memory.

Can the CPU communicate

with the GX Developer?

Is the connection cable

connected properly?

Connect the connection cable properly.

Can the CPU communicate

with the GX Developer?

Completion

NO

YES

NO

YES

YES

NO

YES

NO

YES

YES

NO

USB

Is the connection type RS-232?

RS-232

YES

Is the USB driver

installed in the personal

computer?

NO

Install the USB driver into the
personal computer.

NO

YES

Can the CPU

communicate with GX Developer by

lowering the baud rate?

NO

Can the CPU communicate

with the GX Developer?

Can the CPU

communicate with the 

GX Developer by replacing the

connection cable?

Please consult your local Mitsubishi 
service center or representative, 
explaining a detailed description 
of the problem.

Please consult your local Mitsubishi 
service center or representative, 
explaining a detailed description 
of the problem.