Nord Drivesystems SK 200E Series, Manual

Page: 186 / 265

NORDAC SK 200E Manual
186 Subject to technical alterations BU 0200 GB
Parameter
{Factory setting}
Setting value / Description / Note Device Supervisor
Parameter
set
P552
[-01]
[-02]
CAN Master cycle time
(system bus)
S
In this parameter, the cycle time for the system bus master mode and the CAN open encoder is
set (see P503/514/515):
[01] = CAN Master function , cycle time for system bus master functions
[02] = CANopen abs olute encoder , cycle time for system bus absolute encoder
With the setting 0 = “Auto” the default value (see table) is used.
According to the Baud rate set, there are different minimum values for the actual cycle time:
Baud rate Minimum value tZ Default System Bus Master Default System Bus Abs.
10kBaud 10ms 50ms 20ms
20kBaud 10ms 25ms 20ms
50kBaud 5ms 10ms 10ms
100kBaud 2ms 5ms 5ms
125kBaud 2ms 5ms 5ms
250kBaud 1ms 5ms 2ms
500kBaud 1ms 5ms 2ms
0.0 / 0.1 … 100.0 ms
{ all 0.0 }
1000kBaud: 1ms 5ms 2ms
P555 P Chopper Limit
S
5 ... 100 %
[ 100 ]
A power limit for the brake resistor can be programmed with this parameter. The switch-on time
(modulation level) for the brake chopper can only increase to the maximum specified limit.
The result would be an overvoltage switch-off of the FI.
The correct percentage value is calculated as follows:
2
max
max
*
[%]
U
P R
k
BR
=
R =Brake resistor resistance
P
maxBR
= short-term peak power of the brake resistor
U
max
= chopper switching wave from the FI
1~ 115/230V
⇒
440V=
3~ 230V~
⇒
500V=
3~ 400V~
⇒
1000V=
NOTE: With the use of the internal brake resistor SK BRI4-… a suitable limit must be set.
However, the activation of the limit via the DIP switch (Section 5.1.1), DIP8 = “On”
is recommended.
P556 Braking resistor
S
20 ... 400
Ω
{ 120 }
Value of the brake resistance for the calculation of the maximum brake power to protect the
resistor.
Once the maximum continuous output (P557) including overload (200% for 60s) is reached, an
I
2
t limit error (E003.1) is triggered. Further details in P737.
P557 Brake resistor type
S
0.00 ... 20.00 kW
{ 0.00 }
Continuous power (nominal power) of the resistor, to display the actual utilisation in P737. For a
correctly calculated value, the correct value must be entered into P556 and P557.
0.00 = Off, monitoring disabled