10 TROUBLESHOOTING

MELSEC-Q

10.3.14 Troubleshooting when data cannot be communicated via modem

 

 

 

 

 

 

 

Non

Bidirection

 

Symptom

 

Cause

 

Corrective action

MC

procedure

 

 

 

al protocol

 

 

 

 

 

 

 

protocol

 

 

 

•

A modem initialization error occurs.

• Check the error code and execute

 

 

 

 

 

 

processing accordingly.

 

 

 

 

 

 

 

 

 

 

 

• Auto modem initialization

• Modem connection channel designation is

• Set Modem connection channel

 

 

 

 

cannot be executed.

 

not performed.

 

designation.

 

 

 

 

 

•

There is an error in the switch settings in the

•

Review the switch settings. Set it to match

 

 

 

 

 

 

GX Developer.

 

the local station modem and the TA.

 

 

 

•

Data cannot be

•

Communication protocol setting is incorrect.

• Set the communication protocol to MC

 

 

 

 

 

 

protocol, format 5.

 

 

 

 

communicated with GX

• Transmission setting does not match the

•

Review the transmission setting.

 

 

 

 

Developer supporting the Q

 

external device.

 

 

 

 

 

 

 

 

 

 

 

series C24.

• Communication rate does not match the

•

Review the communication rate setting.

 

 

 

 

 

 

external device.

 

 

 

 

 

 

 

 

 

 

 

 

 

• The product is not supported by the GX

• Confirm the GX Developer’s S/W version.

 

 

 

 

 

 

Developer.

 

 

 

 

 

 

 

 

 

 

 

• The GX Developer does not

 

 

• Check the GX Developer’s connection

 

 

 

• There was an error in the GX Developer

 

system.

 

 

 

 

receive the callback signals

 

 

 

 

 

from the Q Series C24.

 

connection system.

• Set the connection system on “callback

 

 

 

 

 

 

 

reception waiting” and connect.

 

 

 

 

 

 

 

 

 

 

 

 

 

• There is an error in the GX Developer side’s

• Set the modem’s settings on "Auto

 

 

 

 

 

 

modem settings.

 

Reception."

 

 

 

 

 

• There s an error in the GX Developer’s

• Check the GX Developer’s connection

 

 

 

• Callback connections from

 

system.

 

 

 

 

the GX Developer are

 

connection system.

• Correct the Q Series C24’s settings.

 

 

 

 

 

 

 

 

 

 

refused by the Q Series

• There is an error in the connection system’s

• Check the telephone No.

 

 

 

 

C24.

• Change the telephone No. to the data for

 

 

 

 

 

 

telephone No.

 

callback.

 

 

 

 

 

 

 

 

 

 

 

 

 

• There is an error in the Q Series C24

• Set the callback function designation on the

 

 

 

• When performing Auto

 

setting value.

 

setting 1 to 3.

 

 

 

 

(callback: during fixed/

• There is an error in the GX Developer’s

•

Check the GX Developer’s connection

 

 

 

 

during designated number)

 

system.

 

 

 

 

from the GX Developer,

 

connection system.

• Check the Q Series C24’s settings.

 

 

 

 

 

 

 

 

 

 

connection to the Q Series

• There is an error in the telephone No. of the

• Check the telephone No.

 

 

 

 

C24 is refused.

• Change the telephone No. to the data for

 

 

 

 

 

 

connection system.

 

callback.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

•

Adjust each of the timer values for the

 

 

 

•

It is possible to connect

• The timer value for the status of the modem

 

callback function on the GX Developer side.

 

 

 

 

from the GX Developer, but

 

used or the line is short.

 

(Line callback cancel wait time, callback

 

 

 

 

callback from the Q Series

 

 

 

delay time)

 

 

 

 

C24 cannot be performed.

• There is a problem with the modem

• Check the modem’s specifications and

 

 

 

 

 

 

specifications or settings.

 

settings.

 

 

 

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10 - 41