Unable To Write Parameter Setting - Mitsubishi Electric FR-A820-00046 Instruction Manual

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Protective functions
6.6.13

Unable to write parameter setting

Check
points
Input
signal
Parameter
Setting
6.6.14
Power lamp is not lit
Check
points
Main
Circuit,
Control
Circuit
FR-A800
Possible cause
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
selection" setting.
Operation mode and a writing device do
not correspond.
Pr. 72 "PWM frequency selection" was
attempted to be set to "25".
Alternatively, PM sensorless vector
control was attempted while Pr. 72 =
"25".
Possible cause
Wiring or installation is improper.
Check first when you have a trouble
Countermeasure
Stop the operation.
When Pr. 77 "Parameter write selection" = "0"
(initial value), write is enabled only during a
stop.
Choose the PU operation mode.
Or, set Pr. 77 "Parameter write selection" = "2" to
enable parameter write regardless of the
operation mode.
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
purpose.
Pr. 72 = "25" cannot be set under PM sensorless
vector control. (A sine wave filter (MT-BSL/BSC)
cannot be used under PM sensorless vector
control.)
Countermeasure
Check for the wiring and the installation.
Power lamp is lit when power is supplied to the
control circuit (R1/L11, S1/L21).
Refer to
page
5-203
5-203, 5-263
5-203
5-198
5-263,
5-274
5-219
Refer to
page
2-25
6 - 45

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