Mitsubishi-electric QJ71C24N Manuel d'utilisateur télécharger pdf (Page 288)

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MELSEC-Q

10 TROUBLESHOOTING

10.3.10 Troubleshooting when communication error "CH1 ERR.", "CH2 ERR." generate

Symptom Cause Corrective action MC

Bidirectional

Non

procedure

• There is an error in the

communication protocol

or transmission setting.

• Read the error code from the buffer memory

and check the error contents and change the

switch setting to the correct setting.

• There is an error in the

on-line mode switching

designation.

• Read the error code from the buffer memory

and check the error contents and correct the

designation contents.

• On-demand execution

generated an error.

• Read the error code from the buffer memory

and check the error contents and correct the

designation contents.

• The Q series C24

detected an error while

transmitting data.

• Read the error code from the buffer memory

and take the corrective action corresponding to

the error contents.

• The Q series C24

detected an error while

receiving data.

• Read the error code from the buffer memory

and take the corrective action corresponding to

the error contents.

Note

• When the "ERR." LED is turned on, the error code is stored to the following buffer memory.

Error code storage buffer memory

AddressError cause

CH1 CH2

Name

Switch setting error

Mode switching error

203

H Switch setting error, mode switching error storage area

On-demand execution

error

256

H

266

H

On-demand execution result storage area

Data transmission error 257H 267H Data transmission result storage area

Data receive error 258H 268H Data receive result storage area

Modern function error 221

H

Modern function error code storage area

MC protocol

transmission error

025A

H

026A

H

MC protocol transmission error code

Monitoring device error 2205

H

2305

H

PLC CPU monitoring function execution result

• "ERR." LED turned on.

See Section 10.2 for a detailed description of the error codes.

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