Rockwell Automation 20A PowerFlex 70EC/700VC - Manual (Page 92)

88 Regen Power Limit
Regen Power Limit The [Regen Power Lim] is programmed as a percentage of the rated power. The
mechanical energy that is transformed into electrical power during a deceleration or
overhauling load condition is clamped at this level. Without the proper limit, a bus
overvoltage may occur.
When using the bus regulator [Regen Power Lim] can be left at factory default, –
50%. When using dynamic braking or a regenerative supply, [Regen Power Lim]
can be set to the most negative limit possible (–800%). When the user has dynamic
braking or regenerative supply, but wishes to limit the power to the dynamic brake
or regenerative supply, [Regen Power Lim] can be set to a level specified by the
user.
Reset Parameters Resetting all drive parameters at once (in the active memory being used by the
drive) is accomplished by choosing “Reset To Defalts” through the “Memory
Storage” area of the HIM main menu. This command can also be executed from
[Reset To Defalts], parameter 197 which also offers the following three choices:
•
0, “Ready” - Parameter 197 returns to this value after the reset to defaults is
completed.
•
1, “Factory” - All active parameters are reset to values that match the voltage
code (e.g. 400V or 480V) that was shipped.
•
2, “Low Voltage” - All active parameters are reset to values that match the
lowest voltage within its class (e.g. 400V)
•
3, “High Voltage” - All active parameters are reset to values that match the
highest voltage within its class (e.g. 480V)
Reset command 2 would only be used if, for example, a 480V drive (catalog code
D) was to be used on a 400V system and motor.
Reset command 3 would only be used if for example, a 400V drive (catalog code C)
was to be used on a 480V system and 460V motor.
Since reset commands 2 and 3 also reset all drive parameters, they would normally
only be used to initialize the drive for the proper voltage prior to making all other
parameter settings. Note that the setting for [Voltage Select] is also affected by reset
commands 2 and 3, but using [Voltage Select] instead of [Reset To Defalts] will not
initialize parameters such as [Motor NP Volts] and [Motor NP Hertz].
When a reset command is executed, it resets all parameters within the active
parameter set (normally used by the drive to operate). User Sets (additional
memory areas for alternate parameter settings) are unaffected by parameter reset
functions. Transferring a default set of parameters into a user set requires a
parameter reset command followed by a [Save To User Set] command (see "User
Sets" on
page 114 ).
70EC 700VC 700H
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70EC 700VC 700H
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