YASKAWA DX200 Maintenance Manual page 1105

Alarm Name
Alarm Sub
Number
Code
4757 M-SAF SAFETY
GUARD DIAG.
ERROR
4758 M-SAF OVERRUN
DIAG. ERROR
Meaning Cause
Sub code indicates the YSF21 board failure
process that the software of
CPU1 or CPU2 detected an
error.
YSF22 board failure
Other
An error is detected by YSF21 YSF21 board failure
board.
The error is occurred in the
signal that is inverted
representation.
CPU1 1:OT1
CPU1 2:OT2
CPU1 3:OT3
CPU1 4:OT4
CPU2 1:OT1
CPU2 2:OT2
CPU2 3:OT3
CPU2 4:OT4
YSF22 board failure
Other
Remedy
(1)Reset the alarm.
(2)If the alarm occurs again, replace the YSF21 board.
(1)Reset the alarm.
(2)If the alarm occurs again, replace the YSF22 board.
In a system where a plurality of YSF22 boards are connected, replace
the YSF22 board which is connected to the first EAXA21 board.
If the alarm occurs again, save the CMOS.BIN in maintenance mode,
and then contact your Yaskawa representative about occurrence
status (operating procedure).
(1)Reset the alarm.
(2)If the alarm occurs again, replace the YSF21 board.
(1)Reset the alarm.
(2)If the alarm occurs again, replace the YSF22 board.
In a system where a plurality of YSF22 boards are connected, replace
the board, which is connected to the overrun signal on which the alarm
occurred.
If the alarm occurs again, save the CMOS.BIN in maintenance mode,
and then contact your Yaskawa representative about occurrence
status (operating procedure).