Yaskawa DSD 406 - Manual (Page 29)

3 Operation
25 Start-Up Operation
3/21/96
Start-Up
Operation
❏ When power is first applied to the drive, all of the segments on the 4-1/2
digit display will turn on briefly in order to show that all are functioning:
❏ After this lamp test is completed, an internal check is made to determine if
the NVRAM chips have ever been used before, or if the EPROMs are the
same as before power-down. If not, the drive software will attempt to load
the defaults into the NVRAM chips. The SCDU displays the word ‘Prot’ if
the NVRAM PROTECTION switch is in the “ON” position; this prevents
NVRAM updates:
If the display shows ‘Prot’, it is necessary to move the NVRAM
PROTECTION switch to the "OFF" position and press the RESET button
in order to load defaults into NVRAM and restart the drive. Then set the
NVRAM PROTECTION switch back to "ON". This message will only
happen when the drive is powered up for the very first time or if the software
in the drive or the NVRAM chips are changed.
❏ After the LED lamp test has completed, the drive software will now perform
a fuse test on each of the three line fuses. If any power conversion fuse is
open, the SCDU will indicate this on its display as follows:
1.8.8.8.8.
-
..
prot
-
DATA
RED