NORD Drivesystems BU0180 - Manual (Page 125)

6 Parameterisation
BU 0180 GB-0914 Pre-series version 125
Parameter
{Factory setting}
Setting value / Description / Note Device Supervisor
Parameter
set
P552 [-01]
[-02]
CAN Master cycle
(CAN Master cycle time))
S
0 … 100 ms
{ all 2 }
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. encoder, "CANopen absolute encoder", system bus cycle time of
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 t
Z
Default system bus master Default system bus abs.
10 kBaud 10 ms 50 ms 20 ms
20 kBaud 10 ms 25 ms 20 ms
50 kBaud 5 ms 10 ms 10 ms
100 kBaud 2 ms 5 ms 5 ms
125 kBaud 2 ms 5 ms 5 ms
250 kBaud 1 ms 5 ms 2 ms
500 kBaud 1 ms 5 ms 2 ms
1000 kBaud: 1 ms 5 ms 2 ms
P555
P - limit chopper
(P - limit chopper)
Only relevant
for size 2
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: % 100 [%]
2
max
max



U
P R
k BW
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~

440V=
3~ 400V~

840V=
NOTE: If the internal brake resistor SK BRI4-... is used, a suitable limit must be set.
P556
Brake resistor
(Brake resistor)
Only relevant
for size 2
S
20 ... 400

{ 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.