Yaskawa DSD 406 - Manual (Page 26)

2 Installation and Start-Up
22 Drive Start-Up
3/21/96
Parameter
Verification
● If the FAULT LED lights and a fault code appears on the SCDU, then refer
to the Fault/Error Codes List in Section 4, Maintenance, to see what caused
the fault and to find the correct solution. A fault code is the letter 'F'
followed by a number representing the fault. See Section 3, Operation, for
more detailed information about fault reporting and clearing.
●
If the SCDU displays 'Prot', then the initial checks found that the protected
non-volatile RAM (NVRAM) has not been initialized. Move the NVRAM
PROTECTION switch to "OFF" in order to allow the CPU to initialize the
NVRAM with preprogrammed default values. Notice that the NVRAM
UNPROTECTED LED is now lit to indicate the NVRAM
PROTECTION switch position. Next, press the RESET push button. The
drive will go through its power up sequence again; however, this time it will
initialize the protected NVRAM. After the power up sequence has finished,
return the NVRAM PROTECTION switch to "ON" in order to assure
protection of this memory area. Notice that the NVRAM UNPROTECTED
LED is now turned off.
❏ On drives with fans, verify that the fans are working.
When the READY LED on the SCDU is lit, all the selectable parameter data
should be verified for the proper values as follows. See the PCDU Guide for
information on verifying and entering parameter values on a PCDU:
❏ VERIFY OR CHANGE EACH PARAMETER VALUE for the particular
application and motor involved.
❏ PCU DIAGNOSTICS (function # 998) should now be performed to verify
armature and field circuitry.
❏ SELF-TUNE (PCU Parameter Measurement) (function # 997) should be
performed before the drive is “RUN”. This gives the drive various motor
parameters essential for optimal operation. NVRAM protection must be off
to store parameters.
❏ SELF-TUNE SELECT (Function # *) should be turned on for optimal
operation. (* Check the PAC diagram for correct function number.)
❏ STORE PARAMETERS, (function # 994) so that power can be removed and
reapplied without losing the entered parameters. Remember that NVRAM
protection must be OFF to store parameters.
❏ Operate drive, using external control signal inputs shown on the system
schematic.