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Basic Programming
Linear foldback
When the linear output foldback mode of operation
is selected (using the FOLD <ch>,2 command),
when the output current of the Power Module
reaches its limiting value, output voltage and output
current are reduced (depending on the characteristics
of the connected load) down to 0 volts and 30% of
the set current (for an output short-circuit).
Non-linear foldback
When the non-linear output foldback mode of
operation is selected (using the FOLD <ch>,3
command), when the output current of the Power
Module reaches its limiting value, output voltage
drops but the output current is held at its limiting
value (depending on the characteristics of the
connected load). This continues until output voltage
has dropped down to 70% of the set value. From that
point on, output voltage and output current are
reduced (depending on the characteristics of the
connected load) down to 0 volts and 30% of the set
current (for an output short-circuit).
Retry
When the retry current limiting mode of operation is
selected (using the FOLD <ch>,1 command), the output
of the Power Module will shutdown for 3 seconds when
the output current reaches its limiting value. Following the
3 seconds off time, the output of the Power Module will
be reactivated. If during the next second the output current
is still at its limiting value, the output will be shutdown
again. This process is repeated 5 times. After the
fifth consecutive shutdown, the output of the Power
Module remains shut and a fault event is generated.
This operating mode is useful when the connected load can be reset (and thus the cause of
the excessive current eliminated) by removing the power that feeds it.
Shutdown on
This mode of output current limiting (selected using the FOLD <ch>,4 command) is
suitable for very sensitive loads. When this operating mode is selected, the output of the
current limit
Power Module is shutdown as soon as the output current reaches its limiting value.
Reprogramming Delay
When the output of a Power Module is changed (new set values are programmed or it is
turned on or off) some transient phenomenon might occur. These transients in the
output's voltage or current are due to the output's settings, output's capacitance and the
connected load.
The transients in the Power Module's output need to be ignored so they will not generate
warnings or faults. This is achieved by defining a period of time (called the
Reprogramming Delay period) in which the Power Module ignores transients in its
output. The Reprogramming Delay period is activated following every programmed
change in the Power Module's output.
XMP 2600 Programming Manual
Reprogramming Delay
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