Redundant Data Backup On Memory Card - Siemens SINAMICS S120 Function Manual

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Basic information about the drive system

12.6 Data backup

NVRAM and know-how protection

Know-how protection and write protection apply to parameter p7775. If the parameter should

be readable despite activated protection mechanisms, then p7775 must be placed in the

exception list.

NVRAM and write protection

When write protection is activated, p7775 can only be written to from a higher-level controller

using cyclic communication.

More information on fault buffers, diagnostic buffers and message buffers is provided in the

SINAMICS S120 Commissioning Manual.

Redundant data backup on memory card

In conjunction with the "Firmware download via Web server" and the associated remote

access, the "Redundant data backup on memory card" provides safe access again to the

device in the event of an interruption of the connection or the power supply. This redundant

data backup cannot be deactivated.

As of firmware version V4.6, the memory cards have a backup partition in addition to the

normal working partition. The most important data is duplicated on this backup partition

during ramp-up of the CU. This ensures that when you update the data on the memory card

a data loss cannot occur due to a power failure. Only the system can access this backup

partition. The partition is not visible for users.

If damage to the file system is detected on the memory card, the system reconstructs the

data on the working partition from the backup partition at the next ramp-up of the CU. In this

case, the fault "F01072: Memory card restored from backup copy" is output. A running

restoration of the data is indicated via the LEDs (FW Loading). Generally, the restoration of

the data takes one minute.

The duplication of changed project data on the backup partition takes just a few seconds

during ramp-up. After write operations on the working partition (e.g. RAM to ROM), the

system automatically recognizes when an update of the backup copy on the backup partition

is required and issues the message "A01073: POWER ON required for backup copy on

memory card". In this case, perform a POWER ON for the Control Unit or a hardware reset

(via p0972).

Function Manual, (FH1), 01/2013, 6SL3097-4AB00-0BP3

Drive functions