U p r k – NORD Drivesystems BU0200 User 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.