Unable To Write Parameter Setting - Mitsubishi Electric FR-D720S SC EC Instruction Manual

Check first when you have troubles
7.6.13

Unable to write parameter setting

Check points Possible Cause
Input signal
Parameter
Setting
7 - 30
Operation is being performed (signal STF
or STR is ON).
You are attempting to set the parameter in
the External operation mode.
Parameter is disabled by the Pr. 77
"Parameter write selection" setting.
Key lock is activated by the Pr. 161 "Fre-
quency setting/key lock operation selec-
tion" setting.
Operation mode and a writing device do
not correspond.
Countermeasures
Stop the operation.
When Pr. 77 = "0" (initial value), write is
enabled only during a stop.
Choose the PU operation mode.
Or, set Pr. 77 = "2" to enable parameter
write regardless of the operation mode.
Check Pr. 77 "Parameter write selection"
setting.
Check Pr. 161 "Frequency setting/key lock
operation selection" setting.
Check Pr. 79, Pr. 338, Pr. 339 and Pr. 551,
and select an operation mode suitable for
the purpose.
Troubleshooting
Refer to
Page
6-165
6-165
6-165
6-283
6-172,
6-186