6DATA COMMUNICATION USING THE NON PROCEDURE PROTOCOL MELSEC-Q

(2)Confirmation using the module and GX Configurator-SC

1)Confirmation using the display LED

When the Q series C24 detects an error, including a transmission error, the ERR LED lights up. (See Chapter 10.)

2)Confirmation using the GX Configurator-SC

•The monitor function is used to check for errors. (See Sections 8.6.3 and 8.6.5.)

•The ERR LED is turned off with the ERR LED OFF function. (See Section 8.6.10.)

3)Confirming the error code

Use one of the following to confirm the error code.

•GX Configurator-SC monitor function (See Section 8.6.5.)

•GX Developer buffer memory monitor function (monitors addresses 257H/267H)

POINT

When a transmission error occurs, the PLC CPU may not transmit all the designated data.

It is recommended that data communications be performed by establishing a user arbitrary communication procedure that can check normal transmission by reception of a response to data transmission.

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