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CHAPTER 3 FUNCTIONS
3
3.23 Serial Communication Function
7F67
H
Overrun error
The next data was received before the CPU
module completed receive processing.
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.
7F68
H
Framing error
• 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.
• Match the setting of the CPU module with that of
the external device.
• Take noise reduction measures.
7F69
H
Parity error
• 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.
• Match the setting of the CPU module with that of
the external device.
• Take noise reduction measures.
Error code
(hexadecimal)
Error item Description Corrective action
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