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Starting the DPU

11. Verify DPU progresses from blank state to warming to hot standby

via the LEDs and via the Backup Atom attributes as viewed from the

Point Browser at the maxSTATION.

12. Acknowledge all alarms from the new DPU.

13. Place the key switch of the new DPU in the Run or Locked mode.

14. If the new DPU is the primary of the pair, wait at least 30 seconds to

allow its configuration and database to be updated, then press its

Takeover button to give it control.

15. Acknowledge all DPU alarms and make sure they all clear.

16. If the recently removed DPU is to be shipped or put in storage,

unplug the NiCd battery pack from the motherboard’s connector.

Restarting a DPU after Failover

If an inactive DPU detects a problem with the active DPU, it will

immediately take control of the process and force the other DPU to become

inactive. If the originally active DPU is still operating, it will detect the loss

of control and go into an offline mode, setting its State LED to red. In this

mode the DPU will not warm from the new active DPU without manual

intervention.

DO NOT reset the active DPU since there is no available backup and all the

outputs will be reset. Press the Reset button on the inactive DPU. That will

cause it to restart and, if capable, warm from the active. If it does not

properly warm, it should be replaced.

Alarm Annunciation

Diagnostic alarms originating at a DPU are posted as remote alarms on the

maxSTATION Alarm List. Refer to Publication 278558, Alarm Message

Reference Guide, for a description of these alarms. DPU front panel LEDs

also indicate certain fatal diagnostic alarms.

Metso Automation MAX Controls Inc. • 278590 •

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Adaptec 1542B - AHA Storage Controller Fast SCSI 10 MBps Specifiche Pagina 41