Transmission Request Does Not Make The "Sd" Led Blink - Mitsubishi Electric QJ71C24N User Manual

11 TROUBLESHOOTING

11.3.4 Transmission request does not make the "SD" LED blink.

Symptom
• Due to the OFF status of
• Although a
transmission request
was made, "SD" does
• Due to transmission
not blink.
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Cause
• While the CS(CTS) signal is OFF, the Q series C24
the CS(CTS) signal, the Q
series C24 cannot transmit
data to the external
device.
• Wait until the external device is ready to receive data.
control (DTR or DC • When the waiting time is too long, check the external
control), the external
device cannot receive
data.
Corrective action
does not transmit data to the external device.
It must be ON when the external device is ready to
receive data.
device or cable condition.
MELSEC-Q
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