B&R Industries Provit 5000 User Manual - page 361
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Provit 5000 User’s Manual
Technical Appendix • Maintenance Work
CSS-hits (parking of the heads): max. 50 per day; a max. 50,000 in total
Data Protection
In the event of power loss, all data stored on the hard disk is safe. This does not apply to a block
which is just being written to during formatting and reorganization of data blocks, at the time of
a power loss.
Error Rate
With repeated read attempts and ECC corrections, non-recoverable read errors occur not more
than 10 times when reading 1014 bits. Positioning errors which can be corrected within a new
attempt, are triggered max. 10 times for every 107 accesses.
24 Hour Operation
When setting environmental conditions for operating the hard disk, a differentiation is made in
regard to continuous 24 hour operation. A 24 hour operation of the hard disk is possible by
observing the following conditions:
•
The operating temperature of the controller is allowed only to be 5 - 40 °C
•
3 year lifespan or max. 15,000 operating hours
•
MTBF is 200,000 hours
The 24 hour operation facility is a special feature for both the 5A5001.05 and
5A5001.08 hard disk. The hard disk is equipped with a special microcode to fulfill this
purpose, which automatically carries out a spin-down/spin-up cycle every 24 hours
(motor switched off and switched back on; duration is approx. 7 seconds). During this
period of time, the magnet data carrier cannot be written on (write accesses are
cached).
7. Maintenance Work
The following section describes service/maintenance work which can be carried out by the user.
Maintenance Work for
Maintenance Work
Change Interval
1)
1) The change interval refers to the average life span and operating conditions and are recommended by B&R.
Mainboard
Battery
Every 4 years
Fuse
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Interface Board
Battery
Every 4 years
Table 212: Maintenance Work