Technical FAQs

Ask a Question

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:
 
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).
 
Was this helpful?
What can we do to improve the information ?