Functions, monitoring, and protective functions
9.3 Drive functions
Drive converter cabinet units
318 Operating Instructions, 07/07, A5E00288214A
Parameters
• p1240 (p1280)
Vdc controller configuration
• p1245 (p1285)
Vdc_min controller switch-in level
• p1247 (p1287)
Vdc_min controller dynamic factor
• p1250 (p1290)
Vdc controller proportional gain
• p1251 (p1291)
Vdc controller integral action time
• p1252 (p1292)
Vdc controller derivative-action time
• (p1293)
Vdc_min controller output limit (V/f control)
• p1255 (p1295)
Vdc_min controller time threshold
• p1256 (p1296)
Vdc_min controller response
• p1257 (p1297)
Vdc_min controller speed threshold
• r1258 (r1298)
Vdc controller output
9.3.4 Automatic restart function
Description
The automatic restart function automatically restarts the cabinet unit after an undervoltage or
a power failure. The alarms present are acknowledged and the drive is restarted
automatically.
The drive can be restarted using:
● The standard procedure starting from standstill, or
● The flying restart function.
For drives with low moments of inertia and load torques facilitating the stopping of the
drive within a matter of seconds (e.g., pump drives with water gauges), starting from
standstill is recommended.
Note
The flying restart function can also be activated for drives with large moments of inertia
(such as fan drives). This enables you to switch to the motor that is still rotating.
WARNING
If p1210 is set to values >1, the motor can be restarted automatically without the need to
issue the ON command.
In the event of prolonged power failures and when the automatic restart function is
activated (p1210 > 1), the drive may have been at a standstill for a long time and
mistakenly considered to have been switched off.
For this reason, entering the area around the drive when it is in this condition can cause
death, serious injury, or considerable material damage.
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