Xantrex Technology XMP 2600 manual Reprogramming Delay, Retry, Shutdown on current limit

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).

Reprogramming Delay

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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).

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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.

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Shutdown on current limit

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.

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 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 rev. 1.1 21