3）User password can’t be set,change or cancel by host computer,it can only operated by keypad. To
A0.00 of write operation, only effective in two situations： one is in the password decryption; Second,write 0
is in the situation of no password.It will return invalid operation information in other situations.
4）The operation of host computer and keypad to user password is independent. Even if the keyboard
complete decryption, but host computer still need to decrypt when it want to access function codes, and vice
versa.
5）After host computer acquire the access right of parameters,when reading user password,it will return
“0000” instead of actual user password.
6 ） The host computer will acquire the access right of function code after decryption,if there is no
communication for 5minutes,then the access right will disable.And if it want to access function code,it need
to enter user password again.
7 ） When host computer has acquired access right(no user password or has decryption),if the user
password is rewritten by keypad at this moment,the host computer has still the current access right and no
need to decryption again.
（2）Factory password
1）Protection range of factory password：read/write parameters of Group U0,function code management
of Group U0.
2 ） Host computer can only access function code of Group U0 after decryption(write correct factory
password into U0.00).If there is no communication for 5 minutes after acquiring access right,the right will
disable automatically,and it need to enter password again to access Group U0.
3）After acquiring the access right of Group U0,if host computer read U0.00,it will return 0000 instead of
actual factory password.
4）The operation of host computer and keypad to user password is independent. They need to enter the
correct password separately to acquire the access right.
5）Host computer has no right to modify factory password.When host computer write data into U0.00, it
will return invalid operation unless the data is correct password.
10.8 Application example
FV20 only support 16bit access.
Start No.5 VFD to perform forward rotation.
No.5 VFD stops in mode 0.
No.5 VFD jogs forward.
To Next Page
Loading...
Need help?
General
