Siemens SINAMICS G120C Operating Instructions Manual page 251

Parameter
p1211
p1212
p1213[0]
p1213[1]
Additional information is provided in the parameter list of the List Manual.
SINAMICS G120C converter
Operating Instructions, 07/2015, FW V4.7 SP3, A5E34263257B AC
Explanation
Automatic restart start attempts (factory setting: 3)
This parameter is only effective for the settings p1210 = 4, 6, 14, 16, 26.
You define the maximum number of start attempts using p1211. After each successful
acknowledgement, the inverter decrements its internal counter of start attempts by 1.
p1211 = 0 or 1: The inverter only tries to start once. After an unsuccessful start attempt,
the inverter issues fault F07320.
p1211 = n, n > 1: The inverter tries to start n-times The inverter outputs fault F07320 if
the nth starting attempt was unsuccessful.
The inverter sets the start attempt counter back again to the value of p1211, if one of
the following conditions is fulfilled:
After a successful start attempt, the time in p1213[1] has expired.
•
After fault F07320, switch off the motor (OFF1) and acknowledge the fault.
•
You change the start value p1211 or the mode p1210.
•
Automatic restart wait time start attempt (factory setting: 1.0 s)
This parameter is only effective for the settings p1210 = 4, 6, 26.
Examples for setting this parameter:
1. After a power failure, a certain time must elapse before the motor can be switched-
on, e.g. because other machine components are not immediately ready. In this case,
set p1212 longer than the time, after which all of the fault causes have been re-
moved.
2. In operation, the inverter develops a fault condition. The lower you select p1212,
then the sooner the inverter attempts to switch-on the motor again.
Automatic restart monitoring time
for restart (factory setting: 60 s)
This parameter is only effective for the settings p1210 = 4, 6, 14, 16, 26.
With this monitoring function, you limit the time in which the inverter may attempt to
automatically switch-on the motor again.
The monitoring function starts when a fault is identified and ends with a successful start
attempt. If the motor has not successfully started after the monitoring time has expired,
fault F07320 is signaled.
Set the monitoring time longer than the sum of the following times:
+ p1212
+ Time that the inverter requires to start the motor on the fly.
+ Motor magnetizing time (p0346)
+ 1 second
You deactivate the monitoring function with p1213 = 0.
Automatic restart monitoring time
to reset the fault counter (factory setting: 0 s)
This parameter is only effective for the settings p1210 = 4, 6, 14, 16, 26.
Using this monitoring time, you prevent that faults, which continually occur within a
certain time period, are automatically acknowledged each time.
The monitoring function starts with a successful start attempt and ends after the moni-
toring time has expired.
If, during the monitoring time p1213[1], the inverter made more successful starting at-
tempts than defined in p1211, the inverter interrupts the automatic restart function and
signals fault F07320. To switch on the motor again you must acknowledge the fault and
switch on the inverter (ON/OFFS1 = 1).
Advanced commissioning
6.7 Application-specific functions
247