Nautel XR3, Installation Manual

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XR6/XR3 Installation Manual Control and monitoring
Page 9-4 Issue 3.1 2014-06-04
RF driver fault
This fault indicates a problem with the RF drive on the current exciter. If the exciter transfer function
is set to
auto , then the microcontroller will attempt a changeover to the other exciter. If it cannot, or if
the exciter transfer function is set to manual , then this fault will cause a shutback .
PDM drive fault
This fault indicates that the PDM drive has stopped functioning. If the exciter transfer function is set
to
auto , then the microcontroller will attempt a changeover to the other exciter. If it cannot, or if the
exciter transfer function is set to manual , then this fault will cause a shutback .
Cutbacks
Cutback level (1-8)
If three shutbacks occur within five seconds, the transmitter will enter a power reduction mode called
a
cutback .
There are eight levels of cutbacks, the last being a reduction to almost no forward power.
At any given cutback level, there is a predefined time limit that must expire before the cutback level
returns to the previous level (e.g., level three back to level two). If there are no further cutbacks, this
process continues until
Level 0 (normal) is reached.
The cutback recovery process can be overridden by adjusting the power (up or down), or by initiating
a reset - by pressing
Reset
on the transmitter’s GUI
Status
screen or by remote application.
Remote interface faults
Ext. interlock open
The external interlock input is wired to the remote interface PWB by the end user, and triggered by
the conditions that they set (e.g., opening the door to the transmitter room). A triggered interlock
may indicate a safety issue.
Ext. PDM inhibit
An
EXTERNAL PDM INHIBIT
alarm indicates that an external PDM inhibit command is present. The
external PDM Inhibit is wired to the remote interface PWB.
Int. serial fault
This alarm indicates that there is no communication with the remote interface PWB.
The control/display PWB requests updates from the remote interface PWB every 200 ms. This alarm
is triggered when a control/monitor PWB’s request for information is not acknowledged by the
remote interface PWB within two seconds.