Mitsubishi Electric Q26UD(E)HCPU User Manual page 447

Error code
Error item
(Hexadecimal)
Predefined
protocol related
7F20
error (built-
H
in/adapter
serial)
Predefined
protocol related
7F24
error (built-
H
in/adapter
serial)
Predefined
protocol related
7F67
error (built-
H
in/adapter
serial)
Predefined
protocol related
7F68
error (built-
H
in/adapter
serial)
Predefined
protocol related
7F69
error (built-
H
in/adapter
serial)
Predefined
protocol related
7F6A
error (built-
H
in/adapter
serial)
Predefined
protocol related
7FC8
error (built-
H
in/adapter
serial)
Predefined
protocol related
7FF2
error (built-
H
in/adapter
serial)
Error details
• Unable to convert the data to the binary one
when data was received in the protocol
including the packet of conversion variables.
• Unable to convert the data corresponding to
check code to the binary one when data was
received in the protocol including the packet of
check code (ASCII Hexadecimal or ASCII
Decimal).
• Calculated sumcheck does not match the
received one.
• Calculated horizontal parity code does not
match the received one.
• Calculated check code does not match the
received one.
CPU received the next data before completing
receiving process.
• Setting for stop bit is not correct.
• Line could not establish a secure connection
by the ON/OFF operation of the Target Station.
• Noise is generated in line.
• In multi-drop connection, data were
simultaneously sent from multiple devices.
• Setting for parity bit is not correct.
• Line could not establish a secure connection
by the ON/OFF operation of the Target Station.
• Noise is generated in line.
• In multi-drop connection, data were
simultaneously sent from multiple devices.
Skipped the receive data because of the
overflow of receive buffer.
• Invalid setting was found in edited protocol.
• Unsupported function is included in the
protocol setting data written to the CPU
module.
• The protocol setting data written to the CPU
module is corrupted.
In executable instruction under the current
predefined protocol setting.
Corrective action
• Communicate again after checking the send
message, changing it.
• If protocol has been edited, check whether any
errors found for the setting value of the contents,
sign character, number of decimals, delimiter or
digit in the packet format of the target device.
• If protocol has been edited, check whether any
errors found for the type of check code or data
length in the packet format of the target device.
• Check the sum check of the target device.
• Check the horizontal parity code of the target
device.
• Check the check code (sum check, horizontal
parity code, CRC-16) of the target device.
• If protocol has been edited, check whether any
errors found for the process method of check
code, code type, data length, data order,
complement calculation and calculation range in
the packet format of the target device.
• Communicate again after slowing the
communication speed.
• Check whether momentary power failure has not
occurred at the station connected to CPU. (Able
to check by SD1005 of special register) Remove
the cause if momentary power failure has
occurred.
• Match the setting between CPU and the target
device.
• Take noise reduction measures.
• Provide interlocks so that data are not
simultaneously sent from multiple devices in
multi-drop connection.
• Match the setting between CPU and the target
device.
• Take noise reduction measures.
• Provide interlocks so that data are not
simultaneously sent from multiple devices in
multi-drop connection.
Clear the receive buffer by executing the
Predefined protocol with data receiving.
Check the protocol setting data and register it
again.
Check the predefined protocol setting.
APPENDICES
Corresponding
CPU
A
LCPU
LCPU
LCPU
LCPU
LCPU
LCPU
LCPU
LCPU
445