NORD Drivesystems BU0200 - Manual (Page 227)

SK 200E Manual for frequency inverters
226 Subject to technical alterations BU 0200 GB-4411
Parameter
{Factory setting}
Setting value / Description / Note Device Supervisor
Parameter
set
P552 [-01]
[-02]
CAN master circle
(CAN master cycle time)
S
0.0 / 0.1 … 100.0 ms
{ all 0.0 }
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 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
1000kBaud: 1ms 5ms 2ms
P555
P - limit chopper
(Chopper power 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: % 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~

500V=
3~ 400V~

1000V=
NOTE: With If the internal brake resistor SK BR14-... is used, a suitable limit must be set.
However, activation of the limit via the DIP switch S1 (Section 5.2.2.2),
DIP8 = "On" is recommended!
P556
Braking resistor
(Brake resistor)
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.
The settings of this parameter have no effect if an internal brake resistor is used and DIP
switch number 8 from block S1 is actuated.