Power Download Station - Expert Information

Jumpers & switches of the PowerDownload Station (revised version!):




VME command table:




PDS error management:

The PDS Status during standard running should always be $3FF0.
Some error conditions reflect as:
$1FF0 - no data logging
$2FF0 - problem with TriggerCard
$21F0 - XILINXs not loaded
$3EF0 - problem with power supply (one or more currents or voltages out of limit)
$3E70 - temperature alarm
$3FB0 - radiation alarm

Trigger Configuration (XILINX download)

Configuration Error

Download Fail (as resulting from a reload attempt)

External Alarms

Radiation Alarm


HCTx are read back through the CAN system as well - note, that HCTx may be disabled by hand switches on the pDS front!

Temperature Alarm


Both alarms are latched in the PDS and are stationary, that means: once an alarm occurred temporarily only it will stay signalled until it is cleared; if however an alarm condition is not fixed it will survive even a clear.

Internal Alarms

Power Fail

System Fail (Watchdog Alarm)


Power Fail and System Fail are not latched in the PDS, thus when reestablishing the correct conditions the signalling will disappear automatically.

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© by Hans Henschel, 15-sep-96, last revised: 22-sep-98