Password For Fail-Safe Functions; Checksums - Siemens SINAMICS G120 Operating Instructions Manual

Commissioning (software)
5.8 Commissioning the Fail-safe Functions
5.8.2

Password for fail-safe functions

Password for fail-safe functions
There are four parameters associated with the password protection system. All these
parameters require level 3 access (only important when using OP) – the parameters are as
follows:
● r9760 – shows the currently valid password for fail-safe function parameters.
● P9761 – used to enter the password.
● P9762 – used for entering a new password (5 digits with no leading zero (0)).
● P9763 – used to confirm a new password.
When a password is entered (5 digits with no leading zero), it is compared with the password
held in r9760.
If correct, access is granted.
If incorrect, the parameters for fail-safe functions will be locked out and the user will have to
manually exit the commissioning mode for fail-safe functions by using parameter P3900 = 11
which cancels all previous changes to the parameters for fail-safe functions.
To change the password see "General steps for commissioning of fail-safe functions"
5.8.3

Checksums

Checksums
All parameters for fail-safe functions are verified by the use of checksums. These checksums
ensure the integrity of the data held within the drive processors memory.
There are four checksum, two for each of the processors, these are:
● r9798 – actual checksum for P1.
● P9799 – reference checksum for P1.
● r9898 – actual checksum for P2.
● P9899 – reference checksum for P2.
5-66
Operating Instructions, 11/2006, A5E00766042B AA
Control Units CU240S