Yaskawa DSD 406 - Manual (Page 59)

3 Operation
55 3/21/96
Self-Tune (PCU Parameter Measurement)
The process for accessing the PCU PARAMETER MEASUREMENT function
is as follows:
❏ Use the ⇑
and
⇓
keys to select function # 997 from the function level. The
data indicator is turned off during this step.
❏ Press the DATA/FCTN key to enter the "Data" level for function # 997. The
data indicator will be GREEN to indicate that this function is currently being
accessed. The SCDU displays the word 'Prot' if the NVRAM
PROTECTION switch is in the position that will not allow any updates to
the NVRAM:
If the ‘Prot’ message appears, press the DATA/FCTN key to return to the
"Function" level, move the NVRAM PROTECTION switch to the "OFF"
position, and press the DATA/FCTN key again. The SCDU will jump to the
‘Entr’ message (below) if the NVRAM PROTECTION switch is in the
correct position upon entering this function.
The SCDU displays the word ‘Entr’ to prompt the user to press the ENTER
key as further confirmation that the PCU parameter measurement function is
about to be performed:
OFF
DATA
997
prot
GREEN
DATA
entr
❏ Press the ENTER key to actually start the PCU Parameter Measurement
function. The PCU will not begin the measurement routine if a SEVERE
PCU FAULT exists. The PCU will declare a SEVERE FAULT under several
conditions including an IST fault, power supply failure, loss of line
synchronization, low line, or DCU failure. If a SEVERE FAULT exists
when the PCU starts the parameter measurements, the SCDU displays: