Important Messages - Siemens YASKAWA 840DI Maintenance Manual

3.3

Important messages

Warning message may be displayed as shown below if fatal error is detected or acknowledge
is requested at replacement of whole memory data.
The indications such as title bar, illustration of warning (
INFO
notification.
The most of these messages are only indicated at set-up by machine tool builder or
maintenance by our service group. Although, in case of indication of these message during
usual operation, please leave message and contact our service.
In following pages, meaning and remedy are described as a table in each message.
Message
Meaning
Remedy
Message
Meaning
Remedy
TERMS
Alarm: Power-Fail detected, NCK/PLC restart with OK.
When CNC system detects that the voltage of 24V power supply to CNC unit is
dropped for 5 ms, following response is automatically produced.
• turn off backlight LCD of operator panel
• shut down NCK/PLC
• store NCK/PLC data into SRAM on MCI (PLC) board
If 24V power supply is restored before above procedure is done completely, then
this message is displayed.
Press INPUT key. Then turn off and on power supply.
It is assumed to be due to temporary power failure or damage of power supply unit.
If the cause is not specified, please contact our service.
Note: User Data Loaded into MCI card.
This message is indicated at first power on after replacement of MCI board (should
be done by our service). It may be displayed at first power on after extracting of
Ghost data on rare occasions.
In case of indication of this message during usual operation, please leave message
being indicated and contact our service.
MCI board: MCI board is installed in CNC unit. SRAM and PLC are equipped on this board.
Ghost data: Ghost data comprises the data into which whole data on hard disk drive is compressed and
backed up collectively.
) or warning message depends on
3-7

3.3 Important messages