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ABB Substation Automation
Products and Systems
4.1.9.3
1MRS750940-MUM
Technical Reference Manual
Remote transfer data
In some cases, altering parameter values via serial communication requires the use of
the SPA password. The password is a number within the range 1...999. The default
value for the SPA password is 1.
Password protection is removed by entering the password number in parameter V160
and reinstated by writing the same password to parameter V161. Loss of the auxiliary
supply voltage also reinstates protection.
For example, to change a value of setting group 1 to 0.5 x I
• Enter the password, WV160:1
• Write a new value, WS41:0.5
• Reinstate password protection, WV161:1
The SPA password can be changed via the serial bus by entering first the current
password in parameter V160, and writing then a new password to parameter V161.
The MMI password can be changed via parameter V162 but it is not possible to read
the password from this parameter.
Abbreviations used in following tables:
• R = readable data
• W = writeable data
• P = password protected writeable data
• I = input data
• S = setting values
• V = recorded data / parameter
• M = disturbance recorder parameter
• O = output data
REJ 523
, proceed as follows:
n
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