Check first when you have a trouble
Unable to write parameter setting
Power lamp is not lit
6 - 42
Operation is being performed (signal STF or
STR is ON).
You are attempting to set the parameter in
the External operation mode.
Parameter write is disabled by the Pr. 77
"Parameter write selection" setting.
Key lock mode is enabled by the Pr. 161
"Frequency setting/key lock operation
Operation mode and a writing device do
Pr. 72 "PWM frequency selection" was
attempted to be set to "25".
Alternatively, PM motor control was
attempted while Pr. 72 = "25".
Wiring or installation is improper.
Stop the operation.
When Pr. 77 "Parameter write selection" = "0"
(initial value), write is enabled only during a
Choose the PU operation mode.
Or, set Pr. 77 "Parameter write selection" = "2" to
enable parameter write regardless of the
Check the Pr. 77 setting.
Check the Pr. 161 setting.
Check Pr. 79, Pr. 338, Pr. 339, Pr. 550 and Pr. 551,
and select an operation mode suitable for the
Pr. 72 = "25" cannot be set under PM motor
control. (A sine wave filter (MT-BSL/BSC) cannot
be used under PM motor control.)
Check for the wiring and the installation.
Power lamp is lit when power is supplied to the
control circuit (R1/L11, S1/L21).