Password Protection - Parker AC30 Série Mode D'emploi

The following applies to user-mapped parameters:
•
If the parameter has a data type that uses one byte then it will occupy the low byte of the Modbus register and the high byte will be zero,
i.e. the register will not be sign extended.
•
The word order of 32-bit parameters is determined by the inverter parameter 0940 High Word First.
•
Writable 32-bit parameters will only accept a change in value if both registers mapped to the parameter are written to in the same
request.
•
String parameters are packed into the registers low byte first.
•
Writable string parameters will only accept a change if the first register is included in the request. If the string is not null terminated, then
a null termination will be added automatically.

PASSWORD PROTECTION

Write access to parameters via the fixed mapping registers may be restricted by setting the parameter 1659 Modbus TCP Password.
Note that there is no restriction to parameters via the user-defined mapping registers.
When this password is set to a value other than zero, writing to parameters will only be possible when the password is unlocked. If the password
is not unlocked then writes will be ignored.
To unlock the password write to the Modbus register 00518 the value set in the parameter 1659 Modbus TCP Password. Write access
will be available until a subsequent write to the Modbus register 00518 of value 0000.
Note the following:
•
A read of Modbus register 00518 will always respond with a value of 0000 regardless of the password being locked or unlocked.
•
Locking and unlocking the password will apply to all Modbus connections.
•
When all Modbus connections are closed, write access will returned back to the locked state if a password is set.
AC30 series Variable Speed Inverter
A-6
Fieldbuses