Mitsubishi-electric QJ71C24N Manuel d'utilisateur télécharger pdf (Page 272)

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MELSEC-Q

10 TROUBLESHOOTING

Protocol

Error code

(Hexa-

decimal)

Error

Error Contents

Signal

name

Corrective action

Non

Proce-

dure

Bidire-

ctional

7F69H Parity error

• Data does not match the parity bit setting.

• A malfunction occurred in the network because the

power source of the partner station was on or off.

• Noise occurs in the network.

• When the multidrop was connected, data was

transmitted simultaneously by multiple devices.

P/S

• Match the Q series C24 and

external device settings.

• Clear the error information

according to the error

information initialization request

(YE/YF).

In addition, when

communicating data with the

non procedure protocol, execute

the INPUT instruction, and read

and discard the unnecessary

data.

• Measure the noise.

• When connecting the multidrop,

remove the interlock so that

data will not be transmitted

simultaneously by multiple

devices.

7F6A

Buffer full error

• OS receive buffer overflowed and receive data was

skipped.

SIO

• Use DTR and DC control and

perform data communications

so that the buffer does not

become full. (Perform RS ⋅ CS

control when the modem

function is used.)

• If the Read Request signal was

turned ON, execute read

immediately.

7F6B

CD signal control

error

• Data was received when CD signal is OFF when

"CD terminal check enabled" was designated.

CHn

ERR.

• Recheck the CD signal control

of the external device.

(Send while the CD signal is ON.)

• Set "no CD terminal checking"

and perform communication.

7F6C

Transmission error

• Data cannot be sent because the line is not

connected.

CHn

ERR.

• Transmit data after line

connection processing on the

interface side that uses the

modem function.

7F91

7F96

7F98

7F9A

7F9DH

7F9E

7FA0H

7FA3

7FA8H

7FAA

7FAD

7FAF

7FB2

7FB5

7FB6H

7FB8

7FBC

7FC0

7FC4

System error • The OS of the Q series C24 detected some error. — ( 1)

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Mitsubishi-electric QJ71C24N Manuel d'utilisateur Page 272

Commentaires sur ces manuels

Mitsubishi-electric QJ71C24N Manuel d'utilisateur Page 272

Commentaires sur ces manuels

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