SEW DRC2 - Page 125

Operating Instructions – Electronic Motor DRC.-..-SNI
125
8
Description of power section parameters
Parameters
Delay time for
speed monitoring
index 8558.0
This parameter is used to set the delay time for speed monitoring:
• Setting range: 0 – 1
– 10 s
The set current limit can be reached briefly during acceleration, deceleration, or load
peaks. You can prevent the speed monitoring from responding too sensitively by setting
the delay time accordingly. The current limit must be reached permanently for the
duration of the delay time before the monitoring function trips.
Power section parameters \ drive data \ limit values
Minimum speed
index 8576.0
This parameter is used to set the speed value, the lower limit of which must not be
exceeded even when zero is selected as the setpoint.
• Setting range: 0 – 2000 rpm
Minimum speed
index 8517.0
This parameter is used to set the speed value, which cannot be exceeded by a setpoint
specification:
• Setting range: 0 – 2000 rpm
If n
min
> n
max
is set, then n
max
applies.
Current limit
index 8518.0
This parameter is used to set the current limit:
• Setting range: 0 – 250
– 300 % I
N
The user specifies the current limit in % IN based on the continuous apparent current of
the power section. The actually effective current limit calculated by the unit can be lower
to protect the gear unit. It is shown in the parameter "effective current limit".
Effective current
limit index 9951.3
The effective current limit is calculated from the current limit (index 8518.0) and a limiting
factor that depends on the gear ratio. It is shown in % IN.
Torque limit
index 8688.0
This parameter is used to set the torque limit:
• Setting range: 0 – 250
– 300 %
The parameter limits the maximum torque of the motor. It acts on the setpoint of the
motor torque (k
T
× I
N_inverter
). The value is multiplied by the external current limit.
NOTICE
Damage to the DRC drive unit.
Potential damage to property
• Consult SEW-EURODRIVE before you change the torque limit.
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