Mitsubishi Programmable Controllers FX-232ADP Podręcznik Użytkownika Pobierz pdf (Strona 11)

YES

Is RD LED

(receive) lit?

Is M8123

turned on?

No receive

completion

All data is

received?

• Check wiring of RS232C cable.

• Make sure wiring of control line is suited to the external device.

• Make sure the external sending device is normal.

• Check the voltage level of RS232C signal.

(Monitoring D8123)

• Check if receive data length is exceeding the data

area length.

When using terminator

• Make sure the external sending device is sending

the terminator.

• Make sure the terminator value matches.

• Match the communication format.

• Check the timing of control line.

• Check if the send data length is not zero when driving RS instruction.

When using header

• Make sure the external sending device is sending the header.

When using terminator

• Check the timing of send, receive.

• Monitor data in hexadecimal notation (HEX).

• Check on/off of M8161.

• Confirm send data format of the sending device.

[ When M8123 is reset, the PC returns to the wait state. ]

Are the

contents of

receive data

unintelligible?

Normal

Receive

completion

YES

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Mitsubishi Programmable Controllers FX-232ADP Podręcznik Użytkownika Strona 11