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D-500 MK2 User Manual
25. SPEED & VOLTAGE UP/DOWN RELAY OUTPUTS
These outputs will be available in firmware version 5.7
The unit is able to control motorized potentiometers through up/down output functions.
In order to use up/down functions, corresponding digital output function parameter should be set properly.
External potentiometers should be set to mid-point position at initial conditions.
25.1. SPEED UP/DOWN CONTROL
If speed up/down outputs are enabled, the master unit will operate in order to adjust itself to the nominal
speed defined in program parameter Nominal Frequency.
If speed-up or speed-down functions are assigned to digital outputs, then the unit will start to generate speed
up/down pulses in order to control the external speed potentiometer. The analog GOV control output will be
still valid and functional.
The minimum speed pulse width is set through program parameter Speed Up/Down Pulse Minimum.
The minimum delay between two successive pulses is set through program parameter Speed Up/Down
Pulse Delay and the maximum speed pulse width is set through program parameter Speed Up/Down
Pulse Maximum Duration.
Parameter Definition
Speed Up/Down
Pulse Minimum
Speed Up/Down
Pulse Maximum Duration
Speed Up/Down
Pulse Delay
25.2. VOLTAGE UP/DOWN CONTROL
If voltage up/down outputs are enabled, the master unit will operate in order to adjust itself to the nominal
voltage defined in program parameter Nominal Voltage.
If voltage-up or voltage-down functions are assigned to digital outputs, then the unit will start to generate
voltage up/down pulses to control the external voltage potentiometer. The analog AVR control output will be
still valid and functional.
The minimum voltage pulse width is set through program parameter Voltage Up/Down Pulse Minimum.
The minimum delay between two successive pulses is set through program parameter Voltage Up/Down
Pulse Delay and the maximum voltage pulse width is set through program parameter Voltage Up/Down
Pulse Maximum Duration.
Parameter Definition
Voltage Up/Down
Pulse Minimum
Voltage Up/Down
Pulse Maximum Duration
Voltage Up/Down
Pulse Delay
Description
Minimum pulse width in speed pulse control mode.
Maximum pulse width in speed pulse control mode. If this parameter is
set to zero then no maximum pulse width is used.
Minimum pulse delay between two speed up/down control pulses.
Description
Minimum pulse width in voltage pulse control mode.
Maximum pulse width in voltage pulse control mode. If this parameter is
set to zero then no maximum pulse width is used.
Minimum pulse delay between two of voltage up/down control pulses.
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Firmware V-6.3
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