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Function code UD88 is used to set the sleep time, in other words, it contains the minimum time that the condition
(either frequency or power level) should be kept in order to enter the sleep mode. The time units of this parameter
are seconds.
If either of the above conditions is fulfilled the inverter will stop by sleep condition, in other words, it is not required
that both conditions are fulfilled simultaneously.
Do not change the value of function code J17 from factory default value, otherwise it would interfere with
the sleep and wake up functions.
U131
UD98
Wake up function (DC link voltage level to start)
Wake up function (time)
Function code U131 (DC link voltage level to start) is used to set the minimum DC link voltage level to start. If the
DC link voltage multiplied by the factor U127/U126 is higher than the value set in U131 for a time higher than UD98
(time) then the inverter will resume operation.
Function code UD98 is used to set the wake up time, in other words, it contains the minimum time that the
condition (DC link voltage level) should be kept in order to resume operation. The units of this parameter are
seconds.
Do not change the value of function code J17 from factory default value, otherwise it would interfere with
the sleep and wake up functions.
U125
UI08
Big step detection (Disable)
Big step detection (Dead time for next action)
These function codes are related to the big step detection function (both step UP and step DOWN). In the event of
a sudden change of the PV panel conditions (especially irradiance), the voltage of the PV panel will change
suddenly. If this occurs, the inverter detects this situation and changes the PV panel (DC link) voltage set point
accordingly.
F
unction code U125 (Disable) is used to enable or disable the big step detection. If U125 is set to “1.00” the big
step detection function is disabled.
Function code UI08 (Dead time for next action) is used to set the dead time between two consecutive actions of the
big step detection. The dead time allows the PID controller to settle after a big step action occurs.
UH18
UH48
Big step UP detection (Level to detect big step UP)
Big step UP detection (Time to follow the step UP change)
These function codes are related to the big step UP detection function. In the event that the PV panel (DC link)
voltage increases suddenly due to an increase of the solar irradiance, the inverter will increase the PV panel (DC
link) voltage set point.
Function code UH18 (Level to detect big step UP) is used to set the voltage level difference between PID set point
and PID feedback that triggers the Big step up detection function. In other words, if PID feedback > PID set point +
UH18 then the big step up function is triggered. The units of UH18 are in percentage (%), where 100% means 500
V in case of -2/-7 inverters and 1000 V in case of -4 inverters.
Function code UH48 (Time to follow the step UP change) is used to set the time that the PID set point follows the
PID feedback. The time units of this parameter are seconds.
Summary of Contents for Frenic-Sce
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