Mitsubishi Electric MELDAS C6 Instruction Manual page 469

Error Items
XTEN
WAIT
LINK
LAD
*When the "Error Items" is "LINK", the cause of the error will be saved into the R register as follows.
R register
R80
R81
R82
R83
R84
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7.7 Messages During Emergency Stop
Details
External PLC H/W is not found.
The external PLC card is not mounted.
External PLC is not ready.
The External PLC Ready signal is not
turned ON.
External PLC communication error
occurred.
A communication error occurred
between the external PLC and NC.
The user PLC (ladder sequence) has an
illegal code.
The contents of the latest errors.
(Cleared when the error is resolved.)
Bit 0 : Emergency B
Bit 1 : Emergency C
Bit 2 : Emergency D
Bit 3 : Emergency E
Bit 4 : Emergency F
The contents of the latest errors.
(Retained until the NC power is turned
ON next.)
The control signal.
External PLC -> NC
The control signal.
NC -> External PLC
The contents of the latest errors.
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7. List of Alarms
• Check that the external PLC card is
mounted.
• Change the external PLC card.
• Reset and start the external PLC.
• Turn the NC power OFF and then ON.
• Check that the external PLC card is
mounted.
• Change the external PLC card.
• Change the NC card.
• Check the user PLC (ladder sequence) to
see if it uses illegal device numbers or
constants.
Details
• The external PLC is not ready.
• Data is not input from the external PLC.
• Data is not read out by the external
PLC.
• Data is not written into the NC correctly.
• 2-port RAM is not cleared when the
PC_OK signal is turned ON
• This is cleared when the NC power is
turned ON again.
• Writing from PC to NC completion flag
• Writing from NC to PC completion flag.
• This is not cleared even if the NC power
is turned ON again.
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Remedy