MiCOM relays. Do I need to use the password to read/ write information via modbus protocol?
MiCOM Px2 - there is no need to use any password for modbus communication
MiCOM Px3 - there is no need to use any password for modbus communication
MiCOM Px4 - there is no need to use any password for modbus communication in the most part of the firmwares
Exceptions are:
In the mentioned above firmwares some read/write commands should be preceded by the level 3 password. The default one is "AAAA" or "AAAA " (41 41 41 41 or 41 41 41 41 20 20 20 20 in hexa).
MiCOM Px3 - there is no need to use any password for modbus communication
MiCOM Px4 - there is no need to use any password for modbus communication in the most part of the firmwares
Exceptions are:
| Range | Major Firmware Version |
| P14x | 46, A0, B0B |
| P24x | D0 |
| P34x | B0, E0, B1, E1 |
| P44x | C7, E0 |
| P44y | D0, F0, D1, F1, D2, F2 |
| P54x | D0, D1, D2 |
| P64x | 03, B1 |
| P74x | B0 |
| P746 | B2, C2 |
| P841 | C0, D0, C1, D1, C2, D2 |
| P849 | B0 |
In the mentioned above firmwares some read/write commands should be preceded by the level 3 password. The default one is "AAAA" or "AAAA " (41 41 41 41 or 41 41 41 41 20 20 20 20 in hexa).