Mitsubishi Electric Q01UCPU User Manual page 239

Error code
Error item
(hexadecimal)
7F67
Overrun error
H
7F68
Framing error
H
7F69
Parity error
H
Description
The next data was received before the CPU
module completed receive processing.
• The stop bit setting does not match.
• Communication line became unstable by
powering on/off the target device.
• Noise is generated on the
communication line.
• The parity bit setting does not match.
• Communication line became unstable by
powering on/off the target device.
• Noise is generated on the
communication line.
CHAPTER 3 FUNCTIONS
Corrective action
Reduce the communication speed and restart
communication.
Check the CPU module for momentary power failure.
(For the CPU module, use the special register SD53
to check.)
When an momentary power failure occurs, remove its
cause.
• Match the setting of the CPU module with that of
the external device.
• Take noise reduction measures.
• Match the setting of the CPU module with that of
the external device.
• Take noise reduction measures.
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